{"id":4799,"date":"2022-03-07T21:29:34","date_gmt":"2022-03-07T12:29:34","guid":{"rendered":"https:\/\/hatsudy.com\/jp\/?p=4799"},"modified":"2022-07-10T17:39:03","modified_gmt":"2022-07-10T08:39:03","slug":"trigonometric-functions2","status":"publish","type":"post","link":"https:\/\/hatsudy.com\/jp\/trigonometric-functions2.html","title":{"rendered":"90\u00b0-\u03b8\u300190\u00b0+\u03b8\u3001180\u00b0-\u03b8\u3067\u306e\u4e09\u89d2\u6bd4\u306e\u95a2\u4fc2\uff1asin\u3001cos\u3001tan\u306e\u5909\u63db"},"content":{"rendered":"\n<p>sine\uff08\u6b63\u5f26\uff1asin\uff09\u30fbcosine\uff08\u4f59\u5f26\uff1acos\uff09\u30fbtangent\uff08\u6b63\u63a5\uff1atan\uff09\u3092\u5b66\u3076\u3068\u304d\u3001\u89d2\u5ea6\u306e\u8db3\u3057\u7b97\u3084\u5f15\u304d\u7b97\u3092\u3059\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u3001\u4e09\u89d2\u6bd4\u304c\u3069\u306e\u3088\u3046\u306b\u5909\u5316\u3059\u308b\u306e\u304b\u7406\u89e3\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u5177\u4f53\u7684\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u3068\u304d\u306b\u4e09\u89d2\u6bd4\u304c\u3069\u3046\u5909\u308f\u308b\u306e\u304b\u7406\u89e3\u3059\u308b\u306e\u3067\u3059\u3002<\/p>\n<ul>\n<li>\\(90\u00b0-\u03b8\\)<\/li>\n<li>\\(90\u00b0+\u03b8\\)<\/li>\n<li>\\(180\u00b0-\u03b8\\)<\/li>\n<\/ul>\n<p>\u89d2\u5ea6\u3092\u8db3\u3057\u305f\u308a\u5f15\u3044\u305f\u308a\u3059\u308b\u3068\u304d\u3001\u5fc5\u305a\u56f3\u3092\u63cf\u304f\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002\u305d\u3046\u3059\u308c\u3070\u6697\u8a18\u3059\u308b\u3053\u3068\u306a\u304f\u3001\u4e09\u89d2\u6bd4\u304c\u3069\u306e\u3088\u3046\u306b\u5909\u5316\u3059\u308b\u306e\u304b\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u305d\u3053\u3067\u3001\u89d2\u5ea6\u306e\u5909\u5316\u3068\u4e09\u89d2\u6bd4\u306e\u95a2\u4fc2\u3092\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<h2>\\(90\u00b0-\u03b8\\)\u3067\u306e\u4e09\u89d2\u6bd4\u306e\u95a2\u4fc2<\/h2>\n<p>\u4e09\u89d2\u6bd4\u3067sin\u30fbcos\u30fbtan\u3092\u7406\u89e3\u3057\u305f\u5f8c\u3001\u89d2\u5ea6\u304c\u5909\u5316\u3059\u308b\u3068\u304d\u306b\u4e09\u89d2\u6bd4\u304c\u3069\u3046\u5909\u5316\u3059\u308b\u306e\u304b\u7406\u89e3\u3057\u307e\u3057\u3087\u3046\u3002\u5177\u4f53\u7684\u306b\u306f\u300190\u00b0\u304b\u3089\u03b8\uff08\u89d2\u5ea6\uff09\u3092\u5f15\u3044\u305f\u3068\u304d\u306e\u4e09\u89d2\u6bd4\u306e\u5909\u5316\u3092\u5b66\u3076\u306e\u3067\u3059\u3002<\/p>\n<p>\\(0\u00b0\u2266\u03b8\u226690\u00b0\\)\u306e\u3068\u304d\u3001\\(90\u00b0-\u03b8\\)\u306e\u4e09\u89d2\u6bd4\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>\\(sin(90\u00b0-\u03b8)=cos\u03b8\\)<\/li>\n<li>\\(cos(90\u00b0-\u03b8)=sin\u03b8\\)<\/li>\n<li>\\(tan(90\u00b0-\u03b8)=\\displaystyle\\frac{1}{tan\u03b8}\\)<\/li>\n<\/ul>\n<p>\u3053\u306e\u3088\u3046\u306a\u95a2\u4fc2\u6027\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u3064\u307e\u308a90\u00b0\u304b\u3089\u03b8\uff08\u89d2\u5ea6\uff09\u3092\u5f15\u304f\u3053\u3068\u306b\u3088\u3063\u3066\u3001sine\u304ccosine\u306b\u306a\u3063\u305f\u308a\u3001tangent\u304c\u5206\u6570\u306b\u306a\u3063\u305f\u308a\u3059\u308b\u306e\u3067\u3059\u3002<\/p>\n<h3>\\(90\u00b0-\u03b8\\)\u3067sin\u30fbcos\u30fbtan\u304c\u5909\u5316\u3059\u308b\u7406\u7531<\/h3>\n<p>\u305d\u308c\u3067\u306f\u3001\u3053\u306e\u3088\u3046\u306b\\(90\u00b0-\u03b8\\)\u306b\u3088\u3063\u3066\u306a\u305csin\u3001cos\u3001tan\u304c\u5909\u5316\u3059\u308b\u306e\u3067\u3057\u3087\u3046\u304b\u3002\u5148\u307b\u3069\u306e\u516c\u5f0f\u3092\u6697\u8a18\u3057\u3066\u3082\u610f\u5473\u304c\u306a\u304f\u3001\u554f\u984c\u3092\u89e3\u304f\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002\u3064\u307e\u308a\u3001\u516c\u5f0f\u3092\u899a\u3048\u3066\u306f\u3044\u3051\u307e\u305b\u3093\u3002\u305d\u306e\u4ee3\u308f\u308a\u3001\u7406\u7531\u3092\u7406\u89e3\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p><span style=\"color: #0000ff;\">\u4e09\u89d2\u6bd4\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u56f3\u3092\u63cf\u304f\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/span>\u4f8b\u3048\u3070\u3001\u89d2\u5ea6\u304c\u03b8\u306e\u4e09\u89d2\u5f62\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2022\/03\/reyuk3.jpg\" alt=\"\" width=\"500\" height=\"289\" class=\"aligncenter size-full wp-image-4802\" \/><\/p>\n<p>\u3053\u306e\u56f3\u306b\u3064\u3044\u3066\u306f\u554f\u984c\u306a\u304f\u7406\u89e3\u3067\u304d\u308b\u306f\u305a\u3067\u3059\u3002\u6b21\u306b\u3001\\(90\u00b0-\u03b8\\)\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002\\(90\u00b0-\u03b8\\)\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2022\/03\/reyuk13.jpg\" alt=\"\" width=\"600\" height=\"239\" class=\"aligncenter size-full wp-image-4803\" \/><\/p>\n<p>\u5148\u307b\u3069\u306e\u56f3\u3068\u6bd4\u8f03\u3059\u308b\u3068\u3001\\(sin(90\u00b0-\u03b8)=cos\u03b8\\)\u306b\u306a\u3063\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002\u307e\u305f\\(cos(90\u00b0-\u03b8)=sin\u03b8\\)\u3067\u3042\u308a\u3001\\(tan(90\u00b0-\u03b8)=\\displaystyle\\frac{1}{tan\u03b8}\\)\u3067\u3059\u3002<\/p>\n<p>\u305d\u308c\u3067\u306f\u3001\u306a\u305c\u3053\u306e\u56f3\u3092\u63cf\u304f\u3053\u3068\u304c\u3067\u304d\u308b\u306e\u3067\u3057\u3087\u3046\u304b\u3002\u3053\u306e\u7406\u7531\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5408\u540c\u306a\u4e09\u89d2\u5f62\u3092\u914d\u7f6e\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2022\/03\/reyuk14.jpg\" alt=\"\" width=\"600\" height=\"239\" class=\"aligncenter size-full wp-image-4804\" \/><\/p>\n<p>\u3053\u306e\u3088\u3046\u306b\u56f3\u3092\u63cf\u304f\u3068\u3001<span style=\"color: #0000ff;\">\u03b8\u3092\u3082\u3064\u4e09\u89d2\u5f62\u3068\\(90\u00b0-\u03b8\\)\u3092\u3082\u3064\u4e09\u89d2\u5f62\u306f\u5408\u540c\u3067\u3042\u308b\u3068\u308f\u304b\u308a\u307e\u3059\u3002<\/span>\u305d\u306e\u305f\u3081\u3001\u8fba\u306e\u9577\u3055\u306f\u540c\u3058\u3067\u3059\u3002\u305f\u3060\u3001\u8fba\u306e\u5834\u6240\u304c\u5909\u308f\u3063\u3066\u3044\u307e\u3059\u3002\u305d\u3053\u3067\u5408\u540c\u306a\u4e09\u89d2\u5f62\u3092\u5229\u7528\u3057\u3001\\(90\u00b0-\u03b8\\)\u3092\u57fa\u6e96\u3068\u3059\u308b\u76f4\u89d2\u4e09\u89d2\u5f62\u306e\u4e09\u89d2\u6bd4\u3092\u63a2\u3059\u3068\u3001\u5148\u307b\u3069\u306e\u516c\u5f0f\u304c\u6210\u308a\u7acb\u3061\u307e\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u89d2\u5ea6\uff08\u03b8\uff09\u304c30\u00b0\u306e\u5834\u5408\u3001\\(90\u00b0-\u03b8\\)\u306f60\u00b0\u3067\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>\\(sin(90\u00b0-30\u00b0)=sin60\u00b0=cos30\u00b0\\)<\/li>\n<li>\\(cos(90\u00b0-30\u00b0)=cos60\u00b0=sin30\u00b0\\)<\/li>\n<li>\\(tan(90\u00b0-30\u00b0)=tan60\u00b0=\\displaystyle\\frac{1}{tan30\u00b0}\\)<\/li>\n<\/ul>\n<p>\\(sin60\u00b0=\\displaystyle\\frac{\\sqrt{3}}{2}\\)\u3067\u3042\u308a\u3001\\(cos30\u00b0=\\displaystyle\\frac{\\sqrt{3}}{2}\\)\u3067\u3059\u3002\u3053\u306e\u3088\u3046\u306b\u3001\u5b9f\u969b\u306b\u8a08\u7b97\u3057\u3066\u3082\u516c\u5f0f\u304c\u6210\u308a\u7acb\u3064\u3068\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n<p>\u4e09\u89d2\u6bd4\u306e\u95a2\u4fc2\u3092\u7406\u89e3\u3059\u308b\u3068\u304d\u3001\u5fc5\u305a\u56f3\u3092\u5229\u7528\u3057\u307e\u3057\u3087\u3046\u3002\u56f3\u304c\u306a\u3044\u3068\u3001\\(90\u00b0-\u03b8\\)\u306e\u89d2\u5ea6\u3092\u3082\u3064\u76f4\u89d2\u4e09\u89d2\u5f62\u306e\u4e09\u89d2\u6bd4\u3092\u7406\u89e3\u3059\u308b\u306e\u306f\u96e3\u3057\u3044\u3067\u3059\u3002<\/p>\n<h2>\\(0\u00b0\u2266\u03b8\u2266180\u00b0\\)\u306e\u3068\u304d\u306e\u4e09\u89d2\u6bd4<\/h2>\n<p>\u4e00\u65b9\u3067\u89d2\u5ea6\u304c90\u00b0\u307e\u3067\u3067\u306f\u306a\u304f\u3001\\(0\u00b0\u2266\u03b8\u2266180\u00b0\\)\u306e\u3068\u304d\u306f\u3069\u306e\u3088\u3046\u306b\u8003\u3048\u308c\u3070\u3044\u3044\u306e\u3067\u3057\u3087\u3046\u304b\u3002\u4e09\u89d2\u6bd4\u3068\u3044\u3046\u306e\u306f\u3001\u8fba\u306e\u6bd4\u3092\u8868\u3057\u307e\u3059\u3002\u305d\u306e\u305f\u3081sin\u03b8\u3068cos\u03b8\u306e\u5024\u304c1\u3092\u8d85\u3048\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u3002sin\u03b8\u3084cos\u03b8\u304c1\u3092\u8d85\u3048\u308b\u5834\u5408\u3001\u659c\u8fba\u3088\u308a\u3082\u9577\u3044\u305f\u3066\u306e\u8fba\uff08\u307e\u305f\u306f\u6a2a\u306e\u8fba\uff09\u3092\u3082\u3064\u76f4\u89d2\u4e09\u89d2\u5f62\u3068\u306a\u308a\u307e\u3059\u304c\u3001\u305d\u3046\u3057\u305f\u4e09\u89d2\u5f62\u306f\u5b58\u5728\u3057\u306a\u3044\u306e\u3067\u3059\u3002<\/p>\n<p>\u305d\u3053\u3067\u3001\u5148\u307b\u3069\u3068\u540c\u3058\u3088\u3046\u306b\\(x\\)\u5ea7\u6a19\u304c1\u3001\\(y\\)\u5ea7\u6a19\u304c1\u306e\u534a\u5186\u3067\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2022\/03\/reyuk6.jpg\" alt=\"\" width=\"600\" height=\"243\" class=\"aligncenter size-full wp-image-4805\" \/><\/p>\n<p>\\(0\u00b0\u2266\u03b8\u226690\u00b0\\)\u306e\u3068\u304d\u3068\u7570\u306a\u308b\u306e\u306f\u3001\\(0\u00b0\u2266\u03b8\u2266180\u00b0\\)\u3067\u306f\u3001<span style=\"color: #ff0000;\">\u89d2\u5ea6\u304c90\u00b0\u3092\u8d85\u3048\u308b\u3068\\(x\\)\u5ea7\u6a19\u304c\u30de\u30a4\u30ca\u30b9\u306b\u306a\u308b<\/span>\u3053\u3068\u3067\u3059\u3002\\(y\\)\u5ea7\u6a19\u306f\u6b63\u306e\u5024\u3067\u3042\u308b\u3082\u306e\u306e\u3001\\(x\\)\u5ea7\u6a19\u306f\u8ca0\u306e\u5024\u306b\u306a\u308b\u3053\u3068\u3092\u7406\u89e3\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\\(90\u00b0+\u03b8(0\u00b0\u2266\u03b8\u226690\u00b0)\\)\u306e\u89d2\u5ea6\u3092\u3082\u3064\u4e09\u89d2\u5f62\u3067\u306f\u3001\u5fc5\u305a\u89d2\u5ea6\u304c90\u00b0\u3092\u8d85\u3048\u307e\u3059\u3002\u307e\u305f\\(180\u00b0-\u03b8\\)\u306e\u89d2\u5ea6\u3092\u3082\u3064\u4e09\u89d2\u5f62\u3067\u306f\u3001\u4e00\u3064\u306e\u89d2\u5ea6\u304c90\u00b0\u3092\u8d85\u3048\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3044\u305a\u308c\u306b\u3057\u3066\u3082\u89d2\u5ea6\u304c90\u00b0\u3088\u308a\u3082\u5927\u304d\u3044\u3068\u304d\u3001\\(x\\)\u5ea7\u6a19\u304c\u30de\u30a4\u30ca\u30b9\u306b\u306a\u308b\u4e8b\u5b9f\u3092\u77e5\u3063\u3066\u3044\u308b\u3053\u3068\u304c\u91cd\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>\\(90\u00b0+\u03b8\\)\u3067\u306e\u4e09\u89d2\u6bd4\u306e\u95a2\u4fc2<\/h3>\n<p>\u307e\u305a\u3001\\(90\u00b0+\u03b8\\)\u3092\u3082\u3064\u76f4\u89d2\u4e09\u89d2\u5f62\u3067\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3001\u5408\u540c\u306a\u4e09\u89d2\u5f62\u3092\u4f5c\u308a\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2022\/03\/reyuf17.jpg\" alt=\"\" width=\"600\" height=\"318\" class=\"aligncenter size-full wp-image-4806\" \/><\/p>\n<p>\u3053\u306e\u3088\u3046\u306b\u56f3\u3092\u63cf\u304f\u3068\u3001\u89d2\u5ea6\uff08\u03b8\uff09\u306b\u5bfe\u3057\u306690\u00b0\u3092\u52a0\u3048\u308b\u5834\u5408\u3001\u5de6\u5074\u306b\\(90\u00b0-\u03b8\\)\u306e\u89d2\u5ea6\u3092\u3082\u3064\u5408\u540c\u306e\u76f4\u89d2\u4e09\u89d2\u5f62\u3092\u4f5c\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305d\u306e\u305f\u3081\\(90\u00b0+\u03b8\\)\u3067\u306f\u3001\\(90\u00b0-\u03b8\\)\u306e\u89d2\u5ea6\u3092\u3082\u3064\u76f4\u89d2\u4e09\u89d2\u5f62\u306e\u4e09\u89d2\u6bd4\u3092\u8a08\u7b97\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u305f\u3060\u5148\u307b\u3069\u3068\u306f\u7570\u306a\u308a\u3001\\(90\u00b0+\u03b8\\)\u3067\u306f\\(x\\)\u8ef8\u304c\u8ca0\u306e\u5024\u306b\u306a\u308a\u307e\u3059\u3002\u305d\u3053\u3067\u3001\\(x\\)\u8ef8\u304c\u8ca0\u306e\u5024\u3067\u3042\u308b\u3053\u3068\u3092\u8003\u616e\u3057\u3066\u4e09\u89d2\u6bd4\u3092\u3060\u3055\u306a\u3051\u308c\u3070\u3044\u3051\u307e\u305b\u3093\u3002<\/p>\n<p>sine\uff08\u6b63\u5f26\uff09\u306e\u5024\u3092\u3060\u3059\u3068\u304d\u3001\u5229\u7528\u3059\u308b\u5024\u306f\u659c\u8fba\u306e\u9577\u3055\u3068\\(y\\)\u5ea7\u6a19\uff08\u305f\u3066\u306e\u8fba\u306e\u9577\u3055\uff09\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u5024\u306f\u3069\u3061\u3089\u3082\u30d7\u30e9\u30b9\u3067\u3042\u308b\u305f\u3081\u7b26\u53f7\u306f\u5909\u308f\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u4e00\u65b9\u3067cosine\uff08\u4f59\u5f26\uff09\u3092\u3060\u3059\u3068\u304d\u3001\u659c\u8fba\u306e\u9577\u3055\u3068\u6a2a\u306e\u8fba\u306e\u9577\u3055\u3092\u5229\u7528\u3057\u307e\u3059\u3002<span style=\"color: #0000ff;\">\u89d2\u5ea6\u304c90\u00b0\u3088\u308a\u3082\u5927\u304d\u3044\u5834\u5408\u3001\u56f3\u3092\u78ba\u8a8d\u3059\u308b\u3068\u3001\\(x\\)\u5ea7\u6a19\uff08\u6a2a\u306e\u8fba\u306e\u9577\u3055\uff09\u306f\u8ca0\u306e\u5024\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/span>\u305d\u306e\u305f\u3081\u3001\\(cos(90\u00b0+\u03b8)\\)\u3092\\(cos(90\u00b0-\u03b8)\\)\u306b\u5909\u3048\u308b\u3068\u304d\u3001\u30de\u30a4\u30ca\u30b9\u3092\u52a0\u3048\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u540c\u3058\u3088\u3046\u306btangent\uff08\u6b63\u63a5\uff09\u3092\u3060\u3059\u3068\u304d\u3001\\(x\\)\u5ea7\u6a19\uff08\u6a2a\u306e\u8fba\u306e\u9577\u3055\uff09\u3068\\(y\\)\u5ea7\u6a19\uff08\u305f\u3066\u306e\u8fba\u306e\u9577\u3055\uff09\u3092\u5229\u7528\u3057\u307e\u3059\u3002\\(x\\)\u5ea7\u6a19\u306f\u30de\u30a4\u30ca\u30b9\u3067\u3042\u308b\u305f\u3081\u3001\\(tan(90\u00b0+\u03b8)\\)\u3092\\(tan(90\u00b0-\u03b8)\\)\u306b\u5909\u3048\u308b\u3068\u304d\u3001\u30de\u30a4\u30ca\u30b9\u3092\u52a0\u3048\u306a\u3051\u308c\u3070\u3044\u3051\u307e\u305b\u3093\u3002<\/p>\n<p>\u305d\u306e\u305f\u3081\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2022\/03\/reyuk17.jpg\" alt=\"\" width=\"600\" height=\"450\" class=\"aligncenter size-full wp-image-4807\" \/><\/p>\n<p>\u4e09\u89d2\u6bd4\u3067\\(90\u00b0+\u03b8\\)\u3068\u3044\u3046\u306e\u306f\u3001\\(90\u00b0-\u03b8\\)\u306e\u89d2\u5ea6\u3092\u3082\u3064\u76f4\u89d2\u4e09\u89d2\u5f62\u306e\u4e09\u89d2\u6bd4\u3092\u51fa\u3059\u306e\u3068\u610f\u5473\u304c\u540c\u3058\u3067\u3059\u3002\u305f\u3060\\(90\u00b0-\u03b8\\)\u306e\u89d2\u5ea6\u3092\u3082\u3064\u76f4\u89d2\u4e09\u89d2\u5f62\u3068\u7570\u306a\u308a\u3001\\(x\\)\u5ea7\u6a19\u304c\u30de\u30a4\u30ca\u30b9\u306b\u306a\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001cosine\u3068tangent\u306e\u7b26\u53f7\u304c\u30de\u30a4\u30ca\u30b9\u306b\u306a\u308a\u307e\u3059\u3002cosine\u3068tangent\u306f\\(x\\)\u5ea7\u6a19\u3092\u5229\u7528\u3057\u3066\u4e09\u89d2\u6bd4\u3092\u51fa\u3059\u304b\u3089\u3067\u3059\u3002<\/p>\n<h3>\\(180\u00b0-\u03b8\\)\u3067\u306e\u4e09\u89d2\u6bd4\u306e\u95a2\u4fc2<\/h3>\n<p>\u6b21\u306b\u3001\\(180\u00b0-\u03b8\\)\u306e\u89d2\u5ea6\u3092\u3082\u3064\u76f4\u89d2\u4e09\u89d2\u5f62\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002\\(180\u00b0-\u03b8\\)\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u56f3\u3092\u63cf\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2022\/03\/reyuk18.jpg\" alt=\"\" width=\"600\" height=\"167\" class=\"aligncenter size-full wp-image-4808\" \/><\/p>\n<p>\\(180\u00b0-\u03b8\\)\u306e\u89d2\u5ea6\u306f\u03b8\u3068\u540c\u3058\u3067\u3059\u3002\u305d\u306e\u305f\u3081\\(180\u00b0-\u03b8\\)\u306e\u4e09\u89d2\u6bd4\u3092\u51fa\u3059\u3068\u3044\u3046\u306e\u306f\u3001\u89d2\u5ea6\u03b8\u3092\u3082\u3064\u76f4\u89d2\u4e09\u89d2\u5f62\u3092\u8a08\u7b97\u3059\u308b\u306e\u3068\u610f\u5473\u304c\u540c\u3058\u3067\u3059\u3002\u659c\u8fba\u306e\u9577\u3055\u3068\\(y\\)\u5ea7\u6a19\uff08\u305f\u3066\u306e\u8fba\u306e\u9577\u3055\uff09\u304c\u4e21\u65b9\u3068\u3082\u6b63\u306e\u5024\u3067\u3042\u308b\u305f\u3081\u3001\\(sin\uff08180\u00b0-\u03b8)=sin\u03b8\\)\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u305f\u3060\u5148\u307b\u3069\u89e3\u8aac\u3057\u305f\u901a\u308a\u3001\\(x\\)\u5ea7\u6a19\uff08\u4e0b\u306e\u8fba\u306e\u9577\u3055\uff09\u306f\u8ca0\u306e\u5024\u306b\u306a\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081<span style=\"color: #0000ff;\">cosine\u3084tangent\u306e\u5024\u3092\u51fa\u3059\u3068\u304d\u3001\\(180\u00b0-\u03b8\\)\u3067\u306f\u7b54\u3048\u304c\u30de\u30a4\u30ca\u30b9\u306b\u306a\u308a\u307e\u3059\u3002<\/span>\u305d\u306e\u305f\u3081\u3001\u4ee5\u4e0b\u306e\u95a2\u4fc2\u304c\u6210\u308a\u7acb\u3061\u307e\u3059\u3002<\/p>\n<ul>\n<li>\\(sin\uff08180\u00b0-\u03b8)=sin\u03b8\\)<\/li>\n<li>\\(cos(180\u00b0-\u03b8)=-cos\u03b8\\)<\/li>\n<li>\\(tan(180\u00b0-\u03b8)=-tan\u03b8\\)<\/li>\n<\/ul>\n<p>\u56f3\u3092\u63cf\u304f\u3053\u3068\u306b\u3088\u3063\u3066\u3001\u306a\u305c\u3053\u308c\u3089\u306e\u516c\u5f0f\u304c\u6709\u52b9\u306a\u306e\u304b\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u5b9f\u969b\u306b\u554f\u984c\u3092\u89e3\u304f\u3068\u304d\u3001\u5fc5\u305a\u7c21\u5358\u306a\u56f3\u3092\u63cf\u304f\u3053\u3068\u306b\u3088\u3063\u3066\u7b54\u3048\u3092\u51fa\u3059\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002\u305d\u3046\u3057\u306a\u3051\u308c\u3070\u3001\u983b\u7e41\u306b\u8a08\u7b97\u30df\u30b9\u3092\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n<h3>\u5b9f\u969b\u306b\u4e09\u89d2\u6bd4\u306e\u8a08\u7b97\u3092\u884c\u3046<\/h3>\n<p>\u305d\u308c\u3067\u306f\u3001\u5b9f\u969b\u306b\u4e09\u89d2\u6bd4\u306e\u5024\u3092\u51fa\u3057\u307e\u3057\u3087\u3046\u3002\u4f8b\u3048\u3070\\(0\u00b0&lt;\u03b8&lt;180\u00b0\\)\u306e\u3068\u304d\u3001\u4ee5\u4e0b\u306e\u7b54\u3048\u306f\u4f55\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<ul>\n<li>\\(sin\u03b8=\\displaystyle\\frac{1}{3}\\)\u306e\u3068\u304d\u3001cos\u03b8\u3068tan\u03b8\u306e\u5024\u306f\uff1f<\/li>\n<\/ul>\n<p>sin\u03b8\u306e\u5024\u304c\u308f\u304b\u308c\u3070\u3001\u4ee5\u4e0b\u306e\u516c\u5f0f\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u306b\u3088\u3063\u3066cos\u03b8\u3068tan\u03b8\u306e\u5024\u3092\u51fa\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<ul>\n<li>\\(sin^2\u03b8+cos^2\u03b8=1\\)<\/li>\n<li>\\(tan\u03b8=\\displaystyle\\frac{sin\u03b8}{cos\u03b8}\\)<\/li>\n<\/ul>\n<p>\u305d\u3053\u3067\u3001\\(sin^2\u03b8+cos^2\u03b8=1\\)\u306b\u4ee3\u5165\u3057\u307e\u3057\u3087\u3046\u3002\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\\(sin^2\u03b8+cos^2\u03b8=1\\)<\/p>\n<p>\\(\\left(\\displaystyle\\frac{1}{3}\\right)^2+cos^2\u03b8=1\\)<\/p>\n<p>\\(cos^2\u03b8=\\displaystyle\\frac{8}{9}\\)<\/p>\n<p>\\(cos\u03b8=\u00b1\\displaystyle\\frac{2\\sqrt{2}}{3}\\)<\/p>\n<p>\u6b21\u306btan\u03b8\u306e\u5024\u3092\u51fa\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\\(0\u00b0&lt;\u03b8&lt;90\u00b0\\)\u306e\u3068\u304d\u3001cos\u03b8\u306f\u6b63\u306e\u5024\u306b\u306a\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\\(cos\u03b8=\\displaystyle\\frac{2\\sqrt{2}}{3}\\)\u3067\u3059\u3002\u305d\u3053\u3067\u3001\\(tan\u03b8=\\displaystyle\\frac{sin\u03b8}{cos\u03b8}\\)\u306b\u4ee3\u5165\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\\(tan\u03b8=\\displaystyle\\frac{sin\u03b8}{cos\u03b8}\\)<\/p>\n<p>\\(tan\u03b8=sin\u03b8\u00f7cos\u03b8\\)<\/p>\n<p>\\(tan\u03b8=\\displaystyle\\frac{1}{3}\u00f7\\displaystyle\\frac{2\\sqrt{2}}{3}\\)<\/p>\n<p>\\(tan\u03b8=\\displaystyle\\frac{1}{2\\sqrt{2}}\\)<\/p>\n<p>\u4e00\u65b9\u3001\\(90\u00b0&lt;\u03b8&lt;180\u00b0\\)\u306e\u3068\u304d\u3001cos\u03b8\u306f\u8ca0\u306e\u5024\u306b\u306a\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\\(cos\u03b8=-\\displaystyle\\frac{2\\sqrt{2}}{3}\\)\u3067\u3059\u3002\u307e\u305ftan\u03b8\u3082\u8ca0\u306e\u5024\u306b\u306a\u308b\u305f\u3081\u3001\u5148\u307b\u3069\u306e\u7b54\u3048\u306b-1\u3092\u304b\u3051\u307e\u3057\u3087\u3046\u3002\u305d\u306e\u305f\u3081\u3001\\(tan\u03b8=-\\displaystyle\\frac{1}{2\\sqrt{2}}\\)\u3067\u3059\u3002<\/p>\n<p>\u3053\u3046\u3057\u3066\u3001\u4e09\u89d2\u6bd4\u306e\u5024\u3092\u51fa\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>\u4e09\u89d2\u6bd4\u3067\u306e\u4e0d\u7b49\u5f0f<\/h2>\n<p>\u3053\u3053\u307e\u3067\u306e\u5185\u5bb9\u3092\u7406\u89e3\u3059\u308c\u3070\u3001\u4e09\u89d2\u6bd4\u3067\u4e0d\u7b49\u5f0f\u3092\u5229\u7528\u3057\u305f\u5f0f\u3092\u8a08\u7b97\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u4e0d\u7b49\u5f0f\u306e\u554f\u984c\u3092\u89e3\u304f\u5834\u5408\u3001\u5fc5\u305a\u56f3\u3092\u63cf\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u56f3\u3092\u63cf\u304b\u306a\u3044\u5834\u5408\u3001\u975e\u5e38\u306b\u9ad8\u3044\u78ba\u7387\u3067\u8a08\u7b97\u30df\u30b9\u3092\u3059\u308b\u304b\u3089\u3067\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\\(0\u00b0&lt;\u03b8&lt;180\u00b0\\)\u306e\u3068\u304d\u3001\u4ee5\u4e0b\u306e\u4e0d\u7b49\u5f0f\u3092\u6e80\u305f\u3059\u03b8\u306e\u7bc4\u56f2\u306f\u4f55\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<ol>\n<li>\\(sin\u03b8&gt;\\displaystyle\\frac{\\sqrt{3}}{2}\\)<\/li>\n<li>\\(cos\u03b8&lt;\\displaystyle\\frac{\\sqrt{3}}{2}\\)<\/li>\n<li>\\(tan\u03b8&lt;1\\)<\/li>\n<\/ol>\n<p>\u4e0d\u7b49\u5f0f\u306e\u554f\u984c\u3092\u89e3\u304f\u3068\u304d\u3001\u307e\u305a\u306f\u30a4\u30b3\u30fc\u30eb\u306e\u8a18\u53f7\u3092\u5229\u7528\u3057\u3066\u89d2\u5ea6\u3092\u6c42\u3081\u307e\u3057\u3087\u3046\u3002\u305d\u306e\u5f8c\u3001\u4e0d\u7b49\u5f0f\u3092\u6e80\u305f\u3059\u89d2\u5ea6\u3092\u898b\u3064\u3051\u308b\u306e\u3067\u3059\u3002<\/p>\n<p>(1)<\/p>\n<p>\\(sin\u03b8=\\displaystyle\\frac{\\sqrt{3}}{2}\\)\u3092\u89e3\u304f\u3068\u3001\u89d2\u5ea6\uff08\u03b8\uff09\u306f60\u00b0\u3068\u308f\u304b\u308a\u307e\u3059\u3002sin\u03b8\u3067\u306f\u3001\u89d2\u5ea6\u304c\u5927\u304d\u304f\u306a\u308b\u3068\u5024\u304c\u5927\u304d\u304f\u306a\u308a\u307e\u3059\u3002sin\u03b8\u3067\u306f\u3001\u76f4\u89d2\u4e09\u89d2\u5f62\u306e\u305f\u3066\u306e\u9577\u3055\u304c\u5206\u5b50\u306b\u306a\u308a\u307e\u3059\u3002\u659c\u8fba\u306e\u9577\u3055\u306f\u5909\u308f\u3089\u306a\u3044\u3082\u306e\u306e\u3001\u89d2\u5ea6\u304c\u5927\u304d\u304f\u306a\u308c\u3070\\(y\\)\u5ea7\u6a19\uff08\u305f\u3066\u306e\u9577\u3055\uff09\u304c\u5897\u3048\u308b\u304b\u3089\u3067\u3059\u3002<\/p>\n<p>\u305f\u306090\u00b0\u3092\u8d85\u3048\u308b\u3068\u3001\u89d2\u5ea6\u304c\u5927\u304d\u304f\u306a\u308b\u306b\u3057\u305f\u304c\u3063\u3066sin\u03b8\u306e\u5024\u306f\u5c0f\u3055\u304f\u306a\u308a\u307e\u3059\u3002\\(y\\)\u5ea7\u6a19\uff08\u305f\u3066\u306e\u9577\u3055\uff09\u304c\u5c0f\u3055\u304f\u306a\u308b\u304b\u3089\u3067\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u4ee5\u4e0b\u306e\u56f3\u3092\u4f5c\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2022\/03\/reyuk19.jpg\" alt=\"\" width=\"500\" height=\"266\" class=\"aligncenter size-full wp-image-4809\" \/><\/p>\n<p>\u3053\u306e\u3088\u3046\u306b\u56f3\u306b\u3059\u308b\u3068\u3001\\(60\u00b0&lt;\u03b8&lt;120\u00b0\\)\u304c\u7b54\u3048\u3067\u3042\u308b\u3068\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n<p>(2)<\/p>\n<p>\\(cos\u03b8=\\displaystyle\\frac{\\sqrt{3}}{2}\\)\u3092\u89e3\u304f\u3068\u3001\u03b8\u306f30\u00b0\u3067\u3059\u3002\u3053\u306e\u3068\u304d\u89d2\u5ea6\u304c\u5927\u304d\u304f\u306a\u308b\u3068cos\u03b8\u306e\u5024\u306f\u5c0f\u3055\u304f\u306a\u308a\u307e\u3059\u3002\u7406\u7531\u3068\u3057\u3066\u306f\u3001cos\u03b8\u3067\u306f\\(x\\)\u8ef8\u306e\u5ea7\u6a19\uff08\u6a2a\u306e\u7dda\u306e\u9577\u3055\uff09\u304c\u5206\u5b50\u306b\u306a\u308b\u304b\u3089\u3067\u3059\u3002\u307e\u305f\u89d2\u5ea6\u304c90\u00b0\u3092\u8d85\u3048\u308b\u3068\u3001cos\u03b8\u306e\u5024\u306f\u30de\u30a4\u30ca\u30b9\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u305d\u306e\u305f\u3081\\(cos\u03b8&lt;\\displaystyle\\frac{\\sqrt{3}}{2}\\)\u3092\u6e80\u305f\u3059\u89d2\u5ea6\u3068\u3057\u3066\u306f\u3001\u4ee5\u4e0b\u306e\u56f3\u3092\u63cf\u3051\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2022\/03\/reyuk20.jpg\" alt=\"\" width=\"500\" height=\"266\" class=\"aligncenter size-full wp-image-4810\" \/><\/p>\n<p>\u305d\u306e\u305f\u3081\u3001\\(30\u00b0&lt;\u03b8&lt;180\u00b0\\)\u304c\u7b54\u3048\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>(3)<\/p>\n<p>\\(tan\u03b8=1\\)\u3092\u89e3\u304f\u3068\u3001\u03b8\u306f45\u00b0\u3067\u3059\u3002\\(tan\u03b8&lt;1\\)\u3092\u6e80\u305f\u3059\u305f\u3081\u306b\u306f\u3001\u89d2\u5ea6\u306f45\u00b0\u3088\u308a\u3082\u5927\u304d\u3051\u308c\u3070\u3044\u3044\u306e\u3067\u3057\u3087\u3046\u304b\u3001\u305d\u308c\u3068\u3082\u5c0f\u3055\u3051\u308c\u3070\u3044\u3044\u306e\u3067\u3057\u3087\u3046\u304b\u3002\u4eee\u306b\u03b8\u309260\u00b0\u3068\u3059\u308b\u3068\u3001\\(tan\u03b8=\\sqrt{3}\\)\u3067\u3059\u3002\u3064\u307e\u308a\u89d2\u5ea6\u304c45\u00b0\u3088\u308a\u3082\u5927\u304d\u304f\u306a\u308b\u3068\u3001tan\u03b8\u306e\u5024\u306f1\u3088\u308a\u3082\u5927\u304d\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u305d\u306e\u305f\u3081\\(tan\u03b8&lt;1\\)\u3092\u6e80\u305f\u3059\u305f\u3081\u306b\u306f\u3001\u89d2\u5ea6\u306f45\u00b0\u3088\u308a\u3082\u5c0f\u3055\u304f\u306a\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u307e\u305f\u6ce8\u610f\u70b9\u3068\u3057\u3066\u3001\u89d2\u5ea6\u304c90\u00b0\u3088\u308a\u3082\u5927\u304d\u304f\u306a\u308b\u3068\u3001tan\u03b8\u306e\u5024\u306f\u30de\u30a4\u30ca\u30b9\u306b\u306a\u308a\u307e\u3059\u3002\u3064\u307e\u308a<span style=\"color: #0000ff;\">90\u00b0\u3088\u308a\u3082\u89d2\u5ea6\u304c\u5927\u304d\u3044\u5834\u5408\u3001\u5fc5\u305a\\(tan\u03b8&lt;1\\)\u3092\u6e80\u305f\u3057\u307e\u3059\u3002<\/span>\u305d\u306e\u305f\u3081\u3001\u4ee5\u4e0b\u306e\u56f3\u3092\u63cf\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2022\/03\/reyuk21.jpg\" alt=\"\" width=\"500\" height=\"266\" class=\"aligncenter size-full wp-image-4811\" \/><\/p>\n<p>\u56f3\u3092\u898b\u308b\u3068\u3001\\(0\u00b0&lt;\u03b8&lt;45\u00b0,90\u00b0&lt;\u03b8&lt;180\u00b0\\)\u304c\u7b54\u3048\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>\u6b63\u63a5\u306f\u76f4\u7dda\u306e\u50be\u304d\u306b\u306a\u308b<\/h3>\n<p>\u306a\u304a\u3001\u4e09\u89d2\u6bd4\u3067tan\u03b8\u3092\u5229\u7528\u3059\u308b\u306e\u306f\u3069\u306e\u3088\u3046\u306a\u610f\u5473\u304c\u3042\u308b\u306e\u3067\u3057\u3087\u3046\u304b\u3002\u56f3\u3092\u78ba\u8a8d\u3059\u308b\u3068\u3001<span style=\"color: #ff0000;\">tan\u03b8\u306f\u76f4\u7dda\uff08\u4e00\u6b21\u95a2\u6570\uff09\u306e\u50be\u304d\u306b\u306a\u308a\u307e\u3059\u3002<\/span>\u76f4\u7dda\u306e\u50be\u304d\u306f\\(x\\)\u306e\u5897\u52a0\u91cf\u3068\\(y\\)\u306e\u5897\u52a0\u91cf\u3092\u5229\u7528\u3057\u3066\u8a08\u7b97\u3057\u307e\u3059\u3002\u3053\u308c\u304c\u3001tan\u03b8\u306e\u5024\u304c\u4e00\u6b21\u95a2\u6570\u306e\u50be\u304d\u306b\u306a\u308b\u7406\u7531\u3067\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2022\/03\/reyuk22.jpg\" alt=\"\" width=\"600\" height=\"228\" class=\"aligncenter size-full wp-image-4812\" \/><\/p>\n<p>tan\u03b8\u306e\u5024\u3092\u51fa\u3059\u3068\u3044\u3046\u306e\u306f\u3001\u4e00\u6b21\u95a2\u6570\u306e\u50be\u304d\u3092\u51fa\u3059\u306e\u3068\u610f\u5473\u304c\u540c\u3058\u3067\u3042\u308b\u3053\u3068\u3092\u7406\u89e3\u3057\u307e\u3057\u3087\u3046\u3002\u3053\u308c\u3092\u7406\u89e3\u3059\u308c\u3070\u3001\u76f4\u7dda\u304c\u4ea4\u308f\u308b\u3068\u304d\u306e\u89d2\u5ea6\u3092\u8a08\u7b97\u3067\u304d\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u7b54\u3048\u306f\u4f55\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<ul>\n<li>\\(y=x\\)\u3068\\(y=-\\displaystyle\\frac{1}{\\sqrt{3}}x\\)\u306e\u306a\u3059\u89d2\u3092\u6c42\u3081\u307e\u3057\u3087\u3046\u3002<\/li>\n<\/ul>\n<p>\u3053\u306e\u554f\u984c\u3092\u89e3\u304f\u305f\u3081\u3001\u5fc5\u305a\u56f3\u3092\u63cf\u304d\u307e\u3057\u3087\u3046\u3002\u307e\u305a\u3001\\(y=x\\)\u306e\u50be\u304d\u306f1\u3067\u3059\u3002\\(tan\u03b8=1\\)\u306b\u306a\u308b\u305f\u3081\u306b\u306f\u3001\u89d2\u5ea6\u304c45\u00b0\u306b\u306a\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u307e\u305f\\(y=-\\displaystyle\\frac{1}{\\sqrt{3}}x\\)\u306e\u50be\u304d\u306f\\(-\\displaystyle\\frac{1}{\\sqrt{3}}\\)\u3067\u3059\u3002\\(tan\u03b8=-\\displaystyle\\frac{1}{\\sqrt{3}}\\)\u306b\u306a\u308b\u305f\u3081\u306b\u306f\u3001\u89d2\u5ea6\u304c150\u00b0\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u4ee5\u4e0b\u306e\u56f3\u3092\u4f5c\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2022\/03\/reyuk23.jpg\" alt=\"\" width=\"600\" height=\"273\" class=\"aligncenter size-full wp-image-4813\" \/><\/p>\n<p>\u3053\u306e\u3088\u3046\u306b\u56f3\u3092\u4f5c\u308b\u3068\u30012\u3064\u306e\u76f4\u7dda\u306e\u306a\u3059\u89d2\u306f60\u00b0\u3068120\u00b0\u3067\u3042\u308b\u3068\u308f\u304b\u308a\u307e\u3059\u3002tan\u03b8\u304c\u56f3\u5f62\u3067\u3069\u306e\u3088\u3046\u306a\u5f79\u5272\u304c\u3042\u308b\u306e\u304b\u7406\u89e3\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<h2>\u89d2\u5ea6\u306e\u5909\u5316\u306b\u3088\u308bsin\u03b8\u3001cos\u03b8\u3001tan\u03b8\u306e\u5024\u3092\u5b66\u3076<\/h2>\n<p>\u4e09\u89d2\u6bd4\u3067\u306f\u3001\u89d2\u5ea6\u304c\u5909\u5316\u3059\u308b\u3053\u3068\u306b\u3088\u3063\u3066sin\u03b8\u3001cos\u03b8\u3001tan\u03b8\u306e\u5024\u304c\u3069\u306e\u3088\u3046\u306b\u5909\u5316\u3059\u308b\u306e\u304b\u7406\u89e3\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3092\u5b66\u3076\u3068\u304d\u3001\u5fc5\u305a\u56f3\u3092\u4f5c\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u56f3\u3092\u63cf\u3051\u307090\u00b0-\u03b8\u308490\u00b0+\u03b8\u3001180\u00b0-\u03b8\u306e\u3068\u304d\u3001\u4e09\u89d2\u6bd4\u306e\u5024\u304c\u3069\u306e\u3088\u3046\u306b\u5909\u308f\u308b\u306e\u304b\u308f\u304b\u308a\u307e\u3059\u3002\u516c\u5f0f\u3092\u899a\u3048\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u56f3\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u306a\u305c\u4e09\u89d2\u6bd4\u306e\u5024\u304c\u5909\u5316\u3059\u308b\u306e\u304b\u7406\u89e3\u3059\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002\u305d\u3046\u3057\u306a\u3051\u308c\u3070\u3001\u5fdc\u7528\u554f\u984c\u3067\u7b54\u3048\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n<p>\u307e\u305f\u8a08\u7b97\u30df\u30b9\u3092\u306a\u304f\u3059\u305f\u3081\u306b\u306f\u3001\u7c21\u5358\u306a\u56f3\u3092\u63cf\u304f\u3053\u3068\u306b\u3088\u3063\u3066\u7b54\u3048\u3092\u51fa\u3057\u307e\u3057\u3087\u3046\u3002\u4e09\u89d2\u6bd4\u306f\u56f3\u5f62\u306e\u8a08\u7b97\u3067\u3042\u308b\u305f\u3081\u3001\u56f3\u306e\u5229\u7528\u306f\u5fc5\u9808\u3067\u3059\u3002<\/p>\n<p>\u3053\u3053\u307e\u3067\u306e\u5185\u5bb9\u3092\u7406\u89e3\u3057\u3066\u3001\u89d2\u5ea6\u306e\u5909\u5316\u306b\u4f34\u3044\u3001sin\u03b8\u3001cos\u03b8\u3001tan\u03b8\u306e\u5024\u3092\u7b54\u3048\u3089\u308c\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>sine\uff08\u6b63\u5f26\uff1asin\uff09\u30fbcosine\uff08\u4f59\u5f26\uff1acos\uff09\u30fbtangent\uff08\u6b63\u63a5\uff1atan\uff09\u3092\u5b66\u3076\u3068\u304d\u3001\u89d2\u5ea6\u306e\u8db3\u3057\u7b97\u3084\u5f15\u304d\u7b97\u3092\u3059\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u3001\u4e09\u89d2\u6bd4\u304c\u3069\u306e\u3088\u3046\u306b\u5909\u5316\u3059\u308b\u306e\u304b\u7406\u89e3\u3057\u307e\u3057\u3087\u3046\u3002 \u5177\u4f53\u7684\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u3068\u304d\u306b\u4e09\u89d2\u6bd4\u304c\u3069 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4800,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[],"class_list":{"0":"post-4799","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-h-math"},"_links":{"self":[{"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/posts\/4799","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/comments?post=4799"}],"version-history":[{"count":3,"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/posts\/4799\/revisions"}],"predecessor-version":[{"id":7946,"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/posts\/4799\/revisions\/7946"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/media\/4800"}],"wp:attachment":[{"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/media?parent=4799"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/categories?post=4799"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/tags?post=4799"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}