{"id":11388,"date":"2022-12-01T15:15:43","date_gmt":"2022-12-01T06:15:43","guid":{"rendered":"https:\/\/hatsudy.com\/jp\/?p=11388"},"modified":"2022-12-06T04:29:19","modified_gmt":"2022-12-05T19:29:19","slug":"addition-theorem","status":"publish","type":"post","link":"https:\/\/hatsudy.com\/jp\/addition-theorem.html","title":{"rendered":"\u52a0\u6cd5\u5b9a\u7406\uff1a\u516c\u5f0f\u306e\u8a3c\u660e\u30012\u500d\u89d2\u30fb\u534a\u89d2\u30fb3\u500d\u89d2\u306e\u516c\u5f0f"},"content":{"rendered":"\n<p>\u4e09\u89d2\u95a2\u6570\u3067\u5b66\u3076\u5185\u5bb9\u306b\u52a0\u6cd5\u5b9a\u7406\u304c\u3042\u308a\u307e\u3059\u3002\u89d2\u5ea6\u3092\u8db3\u3057\u305f\u308a\u5f15\u3044\u305f\u308a\u3059\u308b\u3068\u304d\u3001\u52a0\u6cd5\u5b9a\u7406\u3092\u5229\u7528\u3059\u308c\u3070sin\u03b8\u3084cos\u03b8\u3001tan\u03b8\u306e\u5024\u3092\u8a08\u7b97\u3067\u304d\u307e\u3059\u3002\u52a0\u6cd5\u5b9a\u7406\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u4f8b\u3048\u3070\\(sin15\u00b0\\)\u306e\u5024\u3092\u5f97\u3089\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u306a\u304a\u3001\u52a0\u6cd5\u5b9a\u7406\u306f2\u76f4\u7dda\u306e\u306a\u3059\u89d2\u3092\u8a08\u7b97\u3059\u308b\u3068\u304d\u306b\u3082\u6709\u52b9\u3067\u3059\u3002\u3053\u306e\u5834\u5408\u3001tan\u03b8\u3092\u7528\u3044\u3066\u8a08\u7b97\u3057\u307e\u3059\u3002<\/p>\n<p>\u307e\u305f\u3001\u52a0\u6cd5\u5b9a\u7406\u3092\u5fdc\u7528\u3059\u308b\u3053\u3068\u30672\u500d\u89d2\u306e\u516c\u5f0f\u3084\u534a\u89d2\u306e\u516c\u5f0f\u30013\u500d\u89d2\u306e\u516c\u5f0f\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u516c\u5f0f\u3092\u899a\u3048\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u52a0\u6cd5\u5b9a\u7406\u3092\u7528\u3044\u3066\u516c\u5f0f\u3092\u5c0e\u51fa\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u3087\u3046\u3002\u3059\u3079\u3066\u306e\u516c\u5f0f\u3092\u899a\u3048\u308b\u306e\u306f\u52b9\u7387\u7684\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u305d\u308c\u3067\u306f\u3001\u3069\u306e\u3088\u3046\u306b\u52a0\u6cd5\u5b9a\u7406\u3092\u7528\u3044\u3066\u8a08\u7b97\u3059\u308c\u3070\u3044\u3044\u306e\u3067\u3057\u3087\u3046\u304b\u3002\u307e\u305f\u3001\u3069\u306e\u3088\u3046\u306b\u516c\u5f0f\u3092\u4f5c\u308c\u3070\u3044\u3044\u306e\u3067\u3057\u3087\u3046\u304b\u3002\u52a0\u6cd5\u5b9a\u7406\u3092\u7528\u3044\u3066\u8a08\u7b97\u554f\u984c\u3092\u89e3\u304f\u65b9\u6cd5\u3092\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<h2>\u52a0\u6cd5\u5b9a\u7406\u306b\u3088\u308b\u516c\u5f0f\u3068\u8a08\u7b97\u65b9\u6cd5<\/h2>\n<p>\u307e\u305a\u3001\u52a0\u6cd5\u5b9a\u7406\u306e\u516c\u5f0f\u3092\u899a\u3048\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002\u52a0\u6cd5\u5b9a\u7406\u3092\u8a3c\u660e\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u3059\u304c\u3001\u6bce\u56de\u8a3c\u660e\u3059\u308b\u306e\u306f\u73fe\u5b9f\u7684\u3067\u306f\u306a\u3044\u305f\u3081\u3001\u516c\u5f0f\u3092\u6697\u8a18\u3059\u308b\u306e\u3067\u3059\u3002\u899a\u3048\u308b\u3079\u304d\u516c\u5f0f\u306f\u4ee5\u4e0b\u306e2\u3064\u3067\u3059\u3002<\/p>\n<ul>\n<li>\\(sin(\u03b1\u00b1\u03b2)=sin\u03b1cos\u03b2\u00b1cos\u03b1sin\u03b2\\)<\/li>\n<li>\\(cos(\u03b1\u00b1\u03b2)=cos\u03b1cos\u03b2\u2213sin\u03b1sin\u03b2\\)<\/li>\n<\/ul>\n<p>\u3053\u308c\u3089\u306e\u516c\u5f0f\u306f\u5fc5\u305a\u899a\u3048\u307e\u3057\u3087\u3046\u3002<\/p>\n<p><span style=\"color: #0000ff;\">tan\u03b8\u306b\u95a2\u3059\u308b\u52a0\u6cd5\u5b9a\u7406\u306e\u516c\u5f0f\u306f\u4f5c\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/span>\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3001\\(sin(\u03b1\u00b1\u03b2)\\)\u3068<br \/>\n\\(cos(\u03b1\u00b1\u03b2)\\)\u3092\u5229\u7528\u3057\u3066\u5f0f\u3092\u4f5c\u308a\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\\(tan(\u03b1\u00b1\u03b2)=\\displaystyle\\frac{sin(\u03b1\u00b1\u03b2)}{cos(\u03b1\u00b1\u03b2)}\\)<\/p>\n<p>\\(tan(\u03b1\u00b1\u03b2)=\\displaystyle\\frac{sin\u03b1cos\u03b2\u00b1cos\u03b1sin\u03b2}{cos\u03b1cos\u03b2\u2213sin\u03b1sin\u03b2}\\)<\/p>\n<p>\u6b21\u306b\u3001\u5206\u5b50\u3068\u5206\u6bcd\u3092\\(cos\u03b1cos\u03b2\\)\u3067\u5272\u308a\u307e\u3057\u3087\u3046\u3002\u305d\u3046\u3059\u308b\u3068\u3001\u4ee5\u4e0b\u306e\u516c\u5f0f\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<ul>\n<li>\\(tan(\u03b1\u00b1\u03b2)=\\displaystyle\\frac{tan\u03b1\u00b1tan\u03b2}{1\u2213tan\u03b1tan\u03b2}\\)<\/li>\n<\/ul>\n<p>\\(tan(\u03b1\u00b1\u03b2)\\)\u306e\u52a0\u6cd5\u5b9a\u7406\u3092\u899a\u3048\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u516c\u5f0f\u3092\u4f5c\u308c\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n<p><strong>\u30fb\u52a0\u6cd5\u5b9a\u7406\u3092\u7528\u3044\u3066\u8a08\u7b97\u3059\u308b<\/strong><\/p>\n<p>\u305d\u308c\u3067\u306f\u3001\u52a0\u6cd5\u5b9a\u7406\u3092\u7528\u3044\u3066\u8a08\u7b97\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u4ee5\u4e0b\u306e\u5024\u306f\u4f55\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<ul>\n<li>\\(sin15\u00b0\\)<\/li>\n<\/ul>\n<p>\u6b21\u306e\u3088\u3046\u306b\u8a08\u7b97\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\\(sin15\u00b0=sin(45\u00b0-30\u00b0)\\)<\/p>\n<p>\\(=sin45\u00b0cos30\u00b0-cos45\u00b0sin30\u00b0\\)<\/p>\n<p>\\(=\\displaystyle\\frac{1}{\\sqrt{2}}\u00b7\\displaystyle\\frac{\\sqrt{3}}{2}-\\displaystyle\\frac{1}{\\sqrt{2}}\u00b7\\displaystyle\\frac{1}{2}\\)<\/p>\n<p>\\(=\\displaystyle\\frac{\\sqrt{3}-1}{2\\sqrt{2}}\\)<\/p>\n<p>\\(=\\displaystyle\\frac{\\sqrt{6}-\\sqrt{2}}{4}\\)<\/p>\n<p>\u3053\u3046\u3057\u3066\u3001\u52a0\u6cd5\u5b9a\u7406\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u5024\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n<h3>\u52a0\u6cd5\u5b9a\u7406\u306e\u8a3c\u660e\uff1a\u8ddd\u96e2\u306e\u516c\u5f0f\u3068\u4f59\u5f26\u5b9a\u7406<\/h3>\n<p>\u305d\u308c\u3067\u306f\u3001\u52a0\u6cd5\u5b9a\u7406\u306e\u8a3c\u660e\u3092\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u5fc5\u305a\u7406\u89e3\u3057\u306a\u3051\u308c\u3070\u3044\u3051\u306a\u3044\u5185\u5bb9\u3067\u306f\u306a\u304f\u3001\u8aad\u307f\u98db\u3070\u3057\u3066\u3082\u554f\u984c\u3042\u308a\u307e\u305b\u3093\u3002\u305f\u3060\u77e5\u8b58\u3068\u3057\u3066\u77e5\u3063\u3066\u3044\u308b\u3068\u3001\u3069\u306e\u3088\u3046\u306b\u516c\u5f0f\u3092\u5c0e\u304d\u51fa\u305b\u308b\u306e\u304b\u77e5\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u305f\u3081\u3001\u6570\u5b66\u3092\u3088\u308a\u6df1\u304f\u5b66\u3079\u307e\u3059\u3002<\/p>\n<p>\u52a0\u6cd5\u5b9a\u7406\u306e\u8a3c\u660e\u3067\u306f\u3001\\(cos(\u03b1+\u03b2)\\)\u304b\u3089\u30b9\u30bf\u30fc\u30c8\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u56f3\u5f62\u3092\u5229\u7528\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2022\/12\/efh1.jpg\" alt=\"\" width=\"600\" height=\"257\" class=\"aligncenter size-full wp-image-11403\" \/><\/p>\n<p>\u8ddd\u96e2\u306e\u516c\u5f0f\u3092\u5229\u7528\u3057\u3066\u3001\u76f4\u7ddaAB\u306e\u8ddd\u96e2\u306e\u4e8c\u4e57\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a08\u7b97\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\\(AB^2=(cos\u03b1-cos\u03b2)^2+(sin\u03b1-sin\u03b2)^2\\)<\/p>\n<p>\\(=cos^2\u03b1-2cos\u03b1cos\u03b2+cos^2\u03b2\\)\\(+sin^2\u03b1\\)\\(-2sin\u03b1sin\u03b2\\)\\(+sin^2\u03b2\\)<\/p>\n<p>\\(=2-2(cos\u03b1cos\u03b2+sin\u03b1sin\u03b2)\\) &#8211; \u2460<\/p>\n<p>\u6b21\u306b\u3001\u4f59\u5f26\u5b9a\u7406\u3092\u5229\u7528\u3057\u3066\u4ee5\u4e0b\u306e\u8a08\u7b97\u3092\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\\(AB^2=OA^2+OB^2-2OA\u00b7OC\\)\\(\u00b7cos(\u03b1-\u03b2)\\)<\/p>\n<p>\\(=1^2+1^2-2\u00b71\u00b71\u00b7cos(\u03b1-\u03b2)\\)<\/p>\n<p>\\(=2-2cos(\u03b1-\u03b2)\\) &#8211; \u2461<\/p>\n<p>\u2460\u3068\u2461\u3088\u308a\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a08\u7b97\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\\(2-2(cos\u03b1cos\u03b2+sin\u03b1sin\u03b2)\\)\\(=2-2cos(\u03b1-\u03b2)\\)<\/p>\n<p>\\(cos(\u03b1-\u03b2)=cos\u03b1cos\u03b2+sin\u03b1sin\u03b2\\)<\/p>\n<p>\u307e\u305f\\(\u03b2\\)\u3092\\(-\u03b2\\)\u306b\u7f6e\u304d\u63db\u3048\u308b\u3068\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>\\(cos(\u03b1+\u03b2)=cos\u03b1cos\u03b2-sin\u03b1sin\u03b2\\)<\/li>\n<\/ul>\n<p>\u3053\u3046\u3057\u3066\u3001cos\u03b8\u306b\u95a2\u3059\u308b\u52a0\u6cd5\u5b9a\u7406\u306e\u8a3c\u660e\u3092\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n<p>\u306a\u304a\u3001cos\u03b8\u3067\u306f\u89d2\u5ea6\u304c\\(\\displaystyle\\frac{\u03c0}{2}\\)\uff0890\u00b0\uff09\u5909\u5316\u3059\u308b\u3068\u3001cos\u03b8\u306fsin\u03b8\u306b\u306a\u308a\u307e\u3059\u3002\u305d\u3053\u3067\\(\u03b1\\)\u3092\\(\\displaystyle\\frac{\u03c0}{2}-\u03b1\\)\u306b\u7f6e\u304d\u63db\u3048\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\\(cos\\left(\\displaystyle\\frac{\u03c0}{2}-\u03b1+\u03b2\\right)\\)\\(=cos\\left(\\displaystyle\\frac{\u03c0}{2}-\u03b1\\right)cos\u03b2\\)\\(-sin\\left(\\displaystyle\\frac{\u03c0}{2}-\u03b1\\right)sin\u03b2\\)<\/p>\n<p>\\(cos\\left(\\displaystyle\\frac{\u03c0}{2}-(\u03b1-\u03b2)\\right)\\)\\(=cos\\left(\\displaystyle\\frac{\u03c0}{2}-\u03b1\\right)cos\u03b2\\)\\(-sin\\left(\\displaystyle\\frac{\u03c0}{2}-\u03b1\\right)sin\u03b2\\)<\/p>\n<p>\\(sin(\u03b1-\u03b2)=sin\u03b1cos\u03b2-cos\u03b1sin\u03b2\\)<\/p>\n<p>\u307e\u305f\u5148\u307b\u3069\u3068\u540c\u69d8\u306b\\(\u03b2\\)\u3092\\(-\u03b2\\)\u306b\u7f6e\u304d\u63db\u3048\u308b\u3068\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>\\(sin(\u03b1+\u03b2)=sin\u03b1cos\u03b2+cos\u03b1sin\u03b2\\)<\/li>\n<\/ul>\n<p>\u3053\u3046\u3057\u3066\u3001\u4e09\u89d2\u95a2\u6570\u306e\u6027\u8cea\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067sin\u03b8\u306b\u3064\u3044\u3066\u3082\u52a0\u6cd5\u5b9a\u7406\u306e\u8a3c\u660e\u3092\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n<h3>\u4e09\u89d2\u95a2\u6570\u306e\u5024\u3092\u52a0\u6cd5\u5b9a\u7406\u3092\u7528\u3044\u3066\u8a08\u7b97\u3059\u308b<\/h3>\n<p>\u305d\u308c\u3067\u306f\u3001\u52a0\u6cd5\u5b9a\u7406\u3092\u7528\u3044\u3066\u4e09\u89d2\u95a2\u6570\u306e\u8a08\u7b97\u3092\u3057\u307e\u3057\u3087\u3046\u3002\u4ee5\u4e0b\u306e\u554f\u984c\u306e\u7b54\u3048\u306f\u4f55\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<ul>\n<li>\\(sin\u03b1=\\displaystyle\\frac{4}{5}\\)\u3001\\(cos\u03b2=\\displaystyle\\frac{5}{13}\\)\u306e\u3068\u304d\u3001\\(cos(\u03b1-\u03b2)\\)\u306e\u5024\u3092\u6c42\u3081\u307e\u3057\u3087\u3046\u3002\u306a\u304a\u3001\\(0&lt;\u03b1&lt;\\displaystyle\\frac{\u03c0}{2}\\)\u3001\\(0&lt;\u03b2&lt;\\displaystyle\\frac{\u03c0}{2}\\)\u3067\u3059\u3002<\/li>\n<\/ul>\n<p>\\(cos(\u03b1-\u03b2)\\)\u306e\u5024\u3092\u8a08\u7b97\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u305f\u3081\u3001\u52a0\u6cd5\u5b9a\u7406\u3092\u5229\u7528\u3057\u307e\u3057\u3087\u3046\u3002\u305f\u3060\u52a0\u6cd5\u5b9a\u7406\u3092\u5229\u7528\u3059\u308b\u305f\u3081\u306b\u306f\u3001\\(sin\u03b2\\)\u3068\\(cos\u03b1\\)\u306e\u5024\u3092\u77e5\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u3053\u3067<span style=\"color: #ff0000;\">\\(sin^2\u03b8+cos^2\u03b8=1\\)\u3092\u5229\u7528\u3057\u3066\u3001\u305d\u308c\u305e\u308c\u306e\u5024\u3092\u8a08\u7b97\u3057\u307e\u3057\u3087\u3046\u3002<\/span><\/p>\n<p>\\(0&lt;\u03b1&lt;\\displaystyle\\frac{\u03c0}{2}\\)\u3088\u308a\u3001\\(cos\u03b1&gt;0\\)\u3067\u3059\u3002\u307e\u305f\\(0&lt;\u03b2&lt;\\displaystyle\\frac{\u03c0}{2}\\)\u3088\u308a\u3001\\(sin\u03b2&gt;0\\)\u3067\u3059\u3002\u6b21\u306b\u3001\u516c\u5f0f\u3092\u5229\u7528\u3057\u3066\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a08\u7b97\u3057\u307e\u3059\u3002<\/p>\n<p><strong>\u30fb\\(cos\u03b1\\)\u306e\u8a08\u7b97<\/strong><\/p>\n<p>\\(sin^2\u03b1+cos^2\u03b1=1\\)<\/p>\n<p>\\(cos\u03b1=\\sqrt{1-sin^2\u03b1}\\)<\/p>\n<p>\\(cos\u03b1=\\displaystyle\\frac{3}{5}\\)<\/p>\n<p><strong>\u30fb\\(sin\u03b2\\)\u306e\u8a08\u7b97<\/strong><\/p>\n<p>\\(sin^2\u03b2+cos^2\u03b2=1\\)<\/p>\n<p>\\(sin\u03b2=\\sqrt{1-cos^2\u03b2}\\)<\/p>\n<p>\\(sin\u03b2=\\displaystyle\\frac{12}{13}\\)<\/p>\n<p>\u305d\u3053\u3067\u3001\u52a0\u6cd5\u5b9a\u7406\u3092\u7528\u3044\u3066\u8a08\u7b97\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\\(cos(\u03b1-\u03b2)=cos\u03b1cos\u03b2+sin\u03b1sin\u03b2\\)<\/p>\n<p>\\(cos(\u03b1-\u03b2)=\\displaystyle\\frac{3}{5}\u00b7\\displaystyle\\frac{5}{13}+\\displaystyle\\frac{4}{5}\u00b7\\displaystyle\\frac{12}{13}\\)<\/p>\n<p>\\(cos(\u03b1-\u03b2)=\\displaystyle\\frac{63}{65}\\)<\/p>\n<p>\u3053\u3046\u3057\u3066\u3001\u52a0\u6cd5\u5b9a\u7406\u3092\u5229\u7528\u3057\u3066\u8a08\u7b97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n<h2>2\u76f4\u7dda\u306e\u306a\u3059\u89d2\u3068tan\u306e\u5229\u7528<\/h2>\n<p>2\u3064\u306e\u89d2\u5ea6\u3092\u5229\u7528\u3057\u3066\u8a08\u7b97\u3059\u308b\u3068\u304d\u3001\u52a0\u6cd5\u5b9a\u7406\u304c\u5f79\u7acb\u3061\u307e\u3059\u3002\u305d\u3053\u3067\u3001\u52a0\u6cd5\u5b9a\u7406\u3092\u7528\u3044\u30662\u76f4\u7dda\u306e\u306a\u3059\u89d2\u3092\u8a08\u7b97\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<ul>\n<li>2\u76f4\u7dda\\(x-2y+2=0\\)\u3068\\(3x-y-3=0\\)\u306e\u306a\u3059\u89d2\u3092\u6c42\u3081\u307e\u3057\u3087\u3046\u3002\u306a\u304a\u3001\u306a\u3059\u89d2\u306f\u92ed\u89d2\u3067\u3059\u3002<\/li>\n<\/ul>\n<p>2\u3064\u306e\u76f4\u7dda\u3092\u5909\u5f62\u3059\u308b\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>\\(y=\\displaystyle\\frac{1}{2}x+1\\)<\/li>\n<li>\\(y=3x-3\\)<\/li>\n<\/ul>\n<p>\u4e0b\u56f3\u306e\u3088\u3046\u306b\u89d2\u5ea6\u3092\\(\u03b1\\)\u3001\\(\u03b2\\)\u3068\u3059\u308b\u3068\u3001\\(tan\u03b1\\)\u306f\u76f4\u7dda\\(y=3x-3\\)\u306e\u50be\u304d\u3067\u3042\u308a\u3001\\(tan\u03b2\\)\u306f\u76f4\u7dda\\(y=\\displaystyle\\frac{1}{2}x+1\\)\u306e\u50be\u304d\u3067\u3059\u3002\u305d\u3053\u3067\\(tan\u03b1=3\\)\u3001\\(tan\u03b2=\\displaystyle\\frac{1}{2}\\)\u3092\u5229\u7528\u3057\u3066\u8a08\u7b97\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2022\/12\/efh2.jpg\" alt=\"\" width=\"600\" height=\"279\" class=\"aligncenter size-full wp-image-11404\" \/><\/p>\n<p>\u52a0\u6cd5\u5b9a\u7406\u3092\u5229\u7528\u3059\u308b\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a08\u7b97\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\\(tan(\u03b1-\u03b2)=\\displaystyle\\frac{tan\u03b1-tan\u03b2}{1+tan\u03b1tan\u03b2}\\)<\/p>\n<p>\\(=\\displaystyle\\frac{3-\\displaystyle\\frac{1}{2}}{1+3\u00b7\\displaystyle\\frac{1}{2}}\\)<\/p>\n<p>\\(=1\\)<\/p>\n<p>\\(tan(\u03b1-\u03b2)=1\\)\u3067\u3042\u308b\u305f\u3081\u30012\u76f4\u7dda\u306e\u306a\u3059\u89d2\u306f\\(\\displaystyle\\frac{\u03c0}{4}\\)\u3067\u3059\u3002<\/p>\n<h2>2\u500d\u89d2\u306e\u516c\u5f0f\u3092\u52a0\u6cd5\u5b9a\u7406\u3092\u7528\u3044\u3066\u5f97\u308b<\/h2>\n<p>\u306a\u304a\u3001\u52a0\u6cd5\u5b9a\u7406\u306e\u5fdc\u7528\u3068\u3057\u30662\u500d\u89d2\u306e\u516c\u5f0f\u3084\u534a\u89d2\u306e\u516c\u5f0f\u30013\u500d\u89d2\u306e\u516c\u5f0f\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u516c\u5f0f\u3092\u899a\u3048\u3066\u306f\u3044\u3051\u307e\u305b\u3093\u3002<span style=\"color: #0000ff;\">\u52a0\u6cd5\u5b9a\u7406\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u30012\u500d\u89d2\u306e\u516c\u5f0f\u3084\u534a\u89d2\u306e\u516c\u5f0f\u30013\u500d\u89d2\u306e\u516c\u5f0f\u3092\u4f5c\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u3087\u3046\u3002<\/span><\/p>\n<p>\u89d2\u5ea6\u3092\u500d\u306b\u3059\u308b\u3068\u304d\u3001\u5f97\u3089\u308c\u308b\u5024\u3092\u8a08\u7b97\u3059\u308b\u305f\u3081\u306e\u516c\u5f0f\u304c2\u500d\u89d2\u306e\u516c\u5f0f\u3067\u3059\u3002\u89d2\u5ea6\u3092\\(\u03b1\\)\u3068\u3059\u308b\u3068\u3001\u4ee5\u4e0b\u304c2\u500d\u89d2\u306e\u516c\u5f0f\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>\\(sin2\u03b1=2sin\u03b1cos\u03b1\\)<\/li>\n<li>\\(cos2\u03b1=cos^2\u03b1-sin^2\u03b1\\)\\(=1-2sin^2\u03b1\\)\\(=2cos^2\u03b1-1\\)<\/li>\n<li>\\(tan2\u03b1=\\displaystyle\\frac{2tan\u03b1}{1-tan^2\u03b1}\\)<\/li>\n<\/ul>\n<p><span style=\"color: #0000ff;\">\u52a0\u6cd5\u5b9a\u7406\u3067\\(\u03b2\\)\u3092\\(\u03b1\\)\u306b\u5909\u3048\u308c\u3070\u30012\u500d\u89d2\u306e\u516c\u5f0f\u3092\u5bb9\u6613\u306b\u4f5c\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/span>\u3053\u308c\u304c\u30012\u500d\u89d2\u306e\u516c\u5f0f\u3092\u899a\u3048\u3066\u306f\u3044\u3051\u306a\u3044\u7406\u7531\u3067\u3059\u3002\u4f8b\u3048\u3070\\(sin2\u03b1\\)\u306e\u516c\u5f0f\u3092\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5c0e\u51fa\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\\(sin(\u03b1+\u03b1)=sin\u03b1cos\u03b1+cos\u03b1sin\u03b1\\)<\/p>\n<p>\\(sin2\u03b1=2sin\u03b1cos\u03b1\\)<\/p>\n<p>\\(cos\u03b1\\)\u3068\\(tan\u03b1\\)\u306b\u3064\u3044\u3066\u3082\u3001\u540c\u69d8\u306b\u516c\u5f0f\u3092\u4f5c\u308c\u307e\u3059\u3002\u306a\u304a\u3001\\(sin^2\u03b1+cos^2\u03b1=1\\)\u3067\u3042\u308b\u305f\u3081\u3001\u3053\u306e\u516c\u5f0f\u3092\u5229\u7528\u3057\u3066\\(cos2\u03b1=cos^2\u03b1-sin^2\u03b1\\)\u3092\u5909\u5f62\u3057\u307e\u3057\u3087\u3046\u3002\u305d\u3046\u3059\u308c\u3070\u3001\u307b\u304b\u306e\u516c\u5f0f\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>\u534a\u89d2\u306e\u516c\u5f0f\u3068\u8a08\u7b97\u65b9\u6cd5<\/h3>\n<p>\u89d2\u5ea6\u3092\u534a\u5206\u306b\u3059\u308b\u3068\u304d\u3001\u534a\u89d2\u306e\u516c\u5f0f\u3092\u5229\u7528\u3057\u307e\u3057\u3087\u3046\u3002\u500d\u89d2\u306e\u516c\u5f0f\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u534a\u89d2\u306e\u516c\u5f0f\u3092\u5f97\u3089\u308c\u307e\u3059\u3002\u500d\u89d2\u306e\u516c\u5f0f\u3088\u308a\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>\\(sin^2\u03b1=\\displaystyle\\frac{1-cos2\u03b1}{2}\\)<\/li>\n<li>\\(cos^2\u03b1=\\displaystyle\\frac{1+cos2\u03b1}{2}\\)<\/li>\n<li>\\(tan^2\u03b1=\\displaystyle\\frac{1-cos2\u03b1}{1+cos2\u03b1}\\)<\/li>\n<\/ul>\n<p>\\(tan^2\u03b1=\\displaystyle\\frac{sin^2\u03b1}{cos^2\u03b1}\\)\u3067\u3042\u308b\u305f\u3081\u3001\u5024\u3092\u4ee3\u5165\u3059\u308b\u3068\u4e0a\u8a18\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u6b21\u306b\u3001\\(\u03b1=\\displaystyle\\frac{\u03b8}{2}\\)\u3068\u3057\u307e\u3057\u3087\u3046\u3002\u305d\u3046\u3059\u308b\u3068\u3001\u4ee5\u4e0b\u306e\u516c\u5f0f\u3092\u5c0e\u51fa\u3067\u304d\u307e\u3059\u3002<\/p>\n<ul>\n<li>\\(sin^2\\displaystyle\\frac{\u03b8}{2}=\\displaystyle\\frac{1-cos\u03b8}{2}\\)<\/li>\n<li>\\(cos^2\\displaystyle\\frac{\u03b8}{2}=\\displaystyle\\frac{1+cos\u03b8}{2}\\)<\/li>\n<li>\\(tan^2\\displaystyle\\frac{\u03b8}{2}=\\displaystyle\\frac{1-cos\u03b8}{1+cos\u03b8}\\)<\/li>\n<\/ul>\n<p>\u3053\u3046\u3057\u3066\u3001\u534a\u89d2\u306e\u516c\u5f0f\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n<p><strong>\u30fb\u516c\u5f0f\u3092\u5229\u7528\u3057\u3066\u8a08\u7b97\u3059\u308b<\/strong><\/p>\n<p>\u305d\u308c\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u554f\u984c\u3092\u89e3\u3044\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<ul>\n<li>\\(\\displaystyle\\frac{\u03c0}{2}&lt;\u03b8&lt;\u03c0\\)\u3001\\(sin\u03b8=\\displaystyle\\frac{4}{5}\\)\u306e\u3068\u304d\u3001\\(sin2\u03b8\\)\u3001\\(cos2\u03b8\\)\u3001\\(tan\\displaystyle\\frac{\u03b8}{2}\\)\u306e\u5024\u3092\u6c42\u3081\u307e\u3057\u3087\u3046\u3002<\/li>\n<\/ul>\n<p>\\(sin^2\u03b8+cos^2\u03b8=1\\)\u3001\\(\\displaystyle\\frac{\u03c0}{2}&lt;\u03b8&lt;\u03c0\\)\u3067\u3042\u308b\u305f\u3081\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306bcos\u03b8\u3092\u8a08\u7b97\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\\(cos^2\u03b8=1-sin^2\u03b8\\)<\/p>\n<p>\\(cos^2\u03b8=\\displaystyle\\frac{9}{25}\\)<\/p>\n<p>\\(cos\u03b8=-\\displaystyle\\frac{3}{5}\\)<\/p>\n<p>\u6b21\u306b\u3001\u52a0\u6cd5\u5b9a\u7406\u3092\u7528\u3044\u3066\u8a08\u7b97\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p><strong>\u30fb\\(sin2\u03b8\\)\u306e\u8a08\u7b97<\/strong><\/p>\n<p>\\(sin2\u03b1=2sin\u03b1cos\u03b1\\)<\/p>\n<p>\\(sin2\u03b1=2\u00b7\\displaystyle\\frac{4}{5}\u00b7-\\displaystyle\\frac{3}{5}\\)<\/p>\n<p>\\(sin2\u03b1=-\\displaystyle\\frac{24}{25}\\)<\/p>\n<p><strong>\u30fb\\(cos2\u03b8\\)\u306e\u8a08\u7b97<\/strong><\/p>\n<p>\\(cos2\u03b8=1-2sin^2\u03b8\\)<\/p>\n<p>\\(cos2\u03b8=1-2\u00b7\\left(\\displaystyle\\frac{4}{5}\\right)^2\\)<\/p>\n<p>\\(cos2\u03b8=-\\displaystyle\\frac{7}{25}\\)<\/p>\n<p><strong>\u30fb\\(tan\\displaystyle\\frac{\u03b8}{2}\\)\u306e\u8a08\u7b97<\/strong><\/p>\n<p>\\(tan^2\\displaystyle\\frac{\u03b8}{2}=\\displaystyle\\frac{1-cos\u03b8}{1+cos\u03b8}\\)<\/p>\n<p>\\(tan^2\\displaystyle\\frac{\u03b8}{2}=\\displaystyle\\frac{1-\\left(-\\displaystyle\\frac{3}{5}\\right)}{1+\\left(-\\displaystyle\\frac{3}{5}\\right)}\\)<\/p>\n<p>\\(tan^2\\displaystyle\\frac{\u03b8}{2}=4\\)<\/p>\n<p>\\(\\displaystyle\\frac{\u03c0}{2}&lt;\u03b8&lt;\u03c0\\)\u3067\u3042\u308b\u305f\u3081\u3001\\(\\displaystyle\\frac{\u03c0}{4}&lt;\\displaystyle\\frac{\u03b8}{2}&lt;\\displaystyle\\frac{\u03c0}{2}\\)\u3067\u3059\u3002\u3064\u307e\u308a\u3001\\(tan\\displaystyle\\frac{\u03b8}{2}&gt;0\\)\u3067\u3059\u3002\u305d\u306e\u305f\u3081\u3001\\(tan\\displaystyle\\frac{\u03b8}{2}=2\\)\u3067\u3059\u3002<\/p>\n<h3>3\u500d\u89d2\u306e\u516c\u5f0f\u3092\u5c0e\u51fa\u3059\u308b<\/h3>\n<p>\u6b21\u306b3\u500d\u89d2\u306e\u516c\u5f0f\u3092\u5b66\u3073\u307e\u3057\u3087\u3046\u3002\u4ee5\u4e0b\u304c3\u500d\u89d2\u306e\u516c\u5f0f\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>\\(sin3\u03b1=3sin\u03b1-4sin^3\u03b1\\)<\/li>\n<li>\\(cos3\u03b1=-3cos\u03b1+4cos^3\u03b1\\)<\/li>\n<\/ul>\n<p>3\u500d\u89d2\u306e\u516c\u5f0f\u306b\u3064\u3044\u3066\u3082\u899a\u3048\u3066\u306f\u3044\u3051\u307e\u305b\u3093\u3002\u516c\u5f0f\u3092\u5c0e\u51fa\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u3087\u3046\u3002\\(3\u03b1=2\u03b1+\u03b1\\)\u3068\u8003\u3048\u3001\u52a0\u6cd5\u5b9a\u7406\u30682\u500d\u89d2\u306e\u516c\u5f0f\u3092\u5229\u7528\u3057\u3066\u5f0f\u3092\u5909\u5f62\u3059\u308b\u306e\u3067\u3059\u3002<\/p>\n<p><strong>\u30fb\\(sin3\u03b1=3sin\u03b1-4sin^3\u03b1\\)\u306e\u5c0e\u51fa<\/strong><\/p>\n<p>\\(sin(2\u03b1+\u03b1)=sin2\u03b1cos\u03b1+cos2\u03b1sin\u03b1\\)<\/p>\n<p>\\(=2sin\u03b1cos^2\u03b1\\)\\(+(1-2sin^2\u03b1)sin\u03b1\\)<\/p>\n<p>\\(=2sin\u03b1(1-sin^2\u03b1)\\)\\(+(1-2sin^2\u03b1)sin\u03b1\\)<\/p>\n<p>\\(=3sin\u03b1-4sin^3\u03b1\\)<\/p>\n<p><strong>\u30fb\\(cos3\u03b1=-3cos\u03b1+4cos^3\u03b1\\)\u306e\u5c0e\u51fa<\/strong><\/p>\n<p>\\(cos(2\u03b1+\u03b1)=cos2\u03b1cos\u03b1-sin2\u03b1sin\u03b1\\)<\/p>\n<p>\\(=(2cos^2\u03b1-1)cos\u03b1\\)\\(-2sin^2\u03b1cos\u03b1\\)<\/p>\n<p>\\(=(2cos^2\u03b1-1)cos\u03b1\\)\\(-2(1-cos^2\u03b1)cos\u03b1\\)<\/p>\n<p>\\(=-3cos\u03b1+4cos^3\u03b1\\)<\/p>\n<p>\u3053\u3046\u3057\u3066\u30013\u500d\u89d2\u306e\u516c\u5f0f\u3092\u5c0e\u51fa\u3067\u304d\u307e\u3057\u305f\u3002\u305d\u308c\u3067\u306f\u30013\u500d\u89d2\u306e\u516c\u5f0f\u3092\u5229\u7528\u3057\u3066\u554f\u984c\u3092\u89e3\u3051\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u3087\u3046\u3002\u4ee5\u4e0b\u306e\u554f\u984c\u306e\u7b54\u3048\u306f\u4f55\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<ul>\n<li>\\(sin3\u03b8=sin\u03b8\\)\u3092\u6e80\u305f\u3059\u03b8\u306b\u3064\u3044\u3066\u3001\\(0\u2266\u03b8&lt;2\u03c0\\)\u306e\u7bc4\u56f2\u3067\u6c42\u3081\u307e\u3057\u3087\u3046\u3002<\/li>\n<\/ul>\n<p>3\u500d\u89d2\u306e\u516c\u5f0f\u3092\u5229\u7528\u3057\u3066\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a08\u7b97\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\\(sin3\u03b8=sin\u03b8\\)<\/p>\n<p>\\(3sin\u03b8-4sin^3\u03b8=sin\u03b8\\)<\/p>\n<p>\\(4sin^3\u03b8-2sin\u03b8=0\\)<\/p>\n<p>\\(sin^3\u03b8-\\displaystyle\\frac{1}{2}sin\u03b8=0\\)<\/p>\n<p>\\(sin\u03b8\\left(sin^2\u03b8-\\displaystyle\\frac{1}{2}\\right)=0\\)<\/p>\n<p>\\(sin\u03b8\\left(sin\u03b8+\\displaystyle\\frac{1}{\\sqrt{2}}\\right)\\left(sin\u03b8-\\displaystyle\\frac{1}{\\sqrt{2}}\\right)=0\\)<\/p>\n<p>\\(sin\u03b8=0,\u00b1\\displaystyle\\frac{1}{\\sqrt{2}}\\)<\/p>\n<p>\\(0\u2266\u03b8&lt;2\u03c0\\)\u3067\u306f\u3001\\(\u03b8=0,\\displaystyle\\frac{\u03c0}{4},\\displaystyle\\frac{3\u03c0}{4},\u03c0,\\displaystyle\\frac{5\u03c0}{4},\\displaystyle\\frac{7\u03c0}{4}\\)\u304c\u7b54\u3048\u3067\u3059\u3002\u52a0\u6cd5\u5b9a\u7406\u3092\u5229\u7528\u3057\u3066\u30013\u500d\u89d2\u306e\u516c\u5f0f\u306b\u3064\u3044\u3066\u3082\u5229\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u3087\u3046\u3002<\/p>\n<h2>\u52a0\u6cd5\u5b9a\u7406\u3092\u899a\u3048\u3001\u516c\u5f0f\u3092\u5c0e\u51fa\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b<\/h2>\n<p>\u89d2\u5ea6\u3092\u8db3\u3057\u305f\u308a\u5f15\u3044\u305f\u308a\u3059\u308b\u3068\u304d\u3001\u52a0\u6cd5\u5b9a\u7406\u304c\u5f79\u306b\u7acb\u3061\u307e\u3059\u300215\u00b0\u308475\u00b0\u306a\u3069\u306e\u89d2\u5ea6\u3067\u3042\u3063\u3066\u3082\u3001\u52a0\u6cd5\u5b9a\u7406\u3092\u5229\u7528\u3059\u308c\u3070\u8a08\u7b97\u3067\u304d\u307e\u3059\u3002\u305d\u3053\u3067\u3001\u52a0\u6cd5\u5b9a\u7406\u3067\u306f\\(sin(\u03b1+\u03b2)\\)\u3068\\(cos(\u03b1+\u03b2)\\)\u3092\u5fc5\u305a\u899a\u3048\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u306a\u304a\u3001\u52a0\u6cd5\u5b9a\u7406\u3067\u306f\\(tan(\u03b1+\u03b2)\\)\u3092\u5b66\u3073\u307e\u3059\u3002\u307e\u305f\u52a0\u6cd5\u5b9a\u7406\u306e\u5fdc\u7528\u3068\u3057\u3066\u30012\u500d\u89d2\u306e\u516c\u5f0f\u3084\u534a\u89d2\u306e\u516c\u5f0f\u30013\u500d\u89d2\u306e\u516c\u5f0f\u3092\u5b66\u3073\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u516c\u5f0f\u3092\u899a\u3048\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u516c\u5f0f\u3092\u5c0e\u51fa\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u3087\u3046\u3002\u52a0\u6cd5\u5b9a\u7406\u306b\u95a2\u308f\u308b\u3059\u3079\u3066\u306e\u516c\u5f0f\u3092\u899a\u3048\u308b\u306e\u306f\u5927\u5909\u3067\u3042\u308a\u3001\u73fe\u5b9f\u7684\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u516c\u5f0f\u3092\u899a\u3048\u306a\u304f\u3066\u3082\u3001\u516c\u5f0f\u3092\u5c0e\u51fa\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308c\u3070\u3001\\(tan(\u03b1+\u03b2)\\)\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u30672\u76f4\u7dda\u306e\u306a\u3059\u89d2\u3092\u8a08\u7b97\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001\u89d2\u5ea6\u30922\u500d\u30843\u500d\u306b\u5909\u63db\u3059\u308b\u3068\u304d\u306e\u8a08\u7b97\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<p>\u52a0\u6cd5\u5b9a\u7406\u3067\u306f\u591a\u304f\u306e\u516c\u5f0f\u3092\u5b66\u3076\u3053\u3068\u306b\u306a\u308b\u305f\u3081\u3001\u3053\u308c\u3089\u306e\u516c\u5f0f\u3092\u3067\u304d\u308b\u3060\u3051\u899a\u3048\u305a\u306b\u8a08\u7b97\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u3053\u3067\u52a0\u6cd5\u5b9a\u7406\u3092\u3069\u306e\u3088\u3046\u306b\u5909\u5f62\u3057\u3001\u8a08\u7b97\u554f\u984c\u3092\u89e3\u3051\u3070\u3044\u3044\u306e\u304b\u7406\u89e3\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e09\u89d2\u95a2\u6570\u3067\u5b66\u3076\u5185\u5bb9\u306b\u52a0\u6cd5\u5b9a\u7406\u304c\u3042\u308a\u307e\u3059\u3002\u89d2\u5ea6\u3092\u8db3\u3057\u305f\u308a\u5f15\u3044\u305f\u308a\u3059\u308b\u3068\u304d\u3001\u52a0\u6cd5\u5b9a\u7406\u3092\u5229\u7528\u3059\u308c\u3070sin\u03b8\u3084cos\u03b8\u3001tan\u03b8\u306e\u5024\u3092\u8a08\u7b97\u3067\u304d\u307e\u3059\u3002\u52a0\u6cd5\u5b9a\u7406\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u4f8b\u3048\u3070\\(sin15\u00b0\\)\u306e\u5024\u3092\u5f97\u3089\u308c\u308b\u3088\u3046\u306b\u306a\u308a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":11407,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[],"class_list":{"0":"post-11388","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\/11388","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=11388"}],"version-history":[{"count":15,"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/posts\/11388\/revisions"}],"predecessor-version":[{"id":11486,"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/posts\/11388\/revisions\/11486"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/media\/11407"}],"wp:attachment":[{"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/media?parent=11388"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/categories?post=11388"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/tags?post=11388"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}