{"id":334,"date":"2021-06-04T16:00:00","date_gmt":"2021-06-04T07:00:00","guid":{"rendered":"https:\/\/www.gakujikai.com\/blog\/?p=334"},"modified":"2021-07-02T09:04:25","modified_gmt":"2021-07-02T00:04:25","slug":"%e7%ac%ac1%e5%9b%9e%e5%80%8d%e8%a7%92%e3%81%ae%e5%bc%8f%e3%81%a8%e5%8d%8a%e8%a7%92%e3%81%ae%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/www.gakujikai.com\/blog\/math-basic\/334\/","title":{"rendered":"\u6570\u5b66\u306e\u57fa\u790e\u5fa9\u7fd2 \u7b2c1\u56de \u500d\u89d2\u306e\u5f0f\u3068\u534a\u89d2\u306e\u5f0f"},"content":{"rendered":"\n<p>\u307f\u306a\u3055\u3093\u3001\u65702 \u3067\u7fd2\u3046\u4e09\u89d2\u95a2\u6570\u306e\u5358\u5143\u306f\u5f0f\u3092\u899a\u3048\u308b\u306e\u304c\u5927\u5909\u3001\u3068\u3044\u3046\u30a4\u30e1\u30fc\u30b8\u304c\u3042\u308a\u307e\u305b\u3093\u304b\uff1f<br>\u500d\u89d2\u30fb\u534a\u89d2(\u6b21\u6570\u4e0b\u3052)\u30fb\u5408\u6210\u30fb\u548c\u7a4d\u30fb\u7a4d\u548cetc.. 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srcset=\"https:\/\/www.gakujikai.com\/blog\/wp-content\/uploads\/2021\/05\/20210529_1.png 488w, https:\/\/www.gakujikai.com\/blog\/wp-content\/uploads\/2021\/05\/20210529_1-300x59.png 300w\" sizes=\"auto, (max-width: 488px) 100vw, 488px\"><\/figure><\/div>\n\n\n\n<p>\u3069\u3046\u3067\u3059\u304b\uff1f\u899a\u3048\u3066\u3044\u307e\u3057\u305f\u304b\uff1f<br>\u3053\u306e\u52a0\u6cd5\u5b9a\u7406\u306e\u5f0f\u306f\u3001\u3082\u3046\u899a\u3048\u308b\u3057\u304b\u3042\u308a\u307e\u305b\u3093\u3002\u5b9a\u7406\u3067\u3059\u304b\u3089\u3082\u3061\u308d\u3093\u8a3c\u660e\u306f\u3067\u304d\u307e\u3059\u304c\u3001\u4eac\u5927\u306e\u5165\u8a66\u554f\u984c\u306b\u306a\u3063\u3066\u3044\u308b\u304f\u3089\u3044\u306b\u306f\u96e3\u3057\u3044\u306e\u3067\u3001\u305d\u308c\u306f\u3053\u3061\u3089\u3067\u306f\u5272\u611b\u3057\u307e\u3059\u3002<br>\u5b66\u800c\u4f1a\u3067\u306f\u9ad83 \u3067\u89e3\u304f\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3055\u3066\u3001\u3053\u308c\u304c\u30de\u30a4\u30ca\u30b9\u306b\u306a\u308b\u3068<\/p>\n\n\n\n\\(\n\\sin(-\\beta)=-\\sin\\beta\\\\\n\\cos(-\\beta)=\\cos\\beta\n\\)\n\n\n\n<p>\u3067\u3042\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u5909\u5f62\u3059\u308c\u3070 <\/p>\n\n\n\n<div class=\"wp-block-image is-style-sango-with-border\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"628\" height=\"301\" src=\"https:\/\/www.gakujikai.com\/blog\/wp-content\/uploads\/2021\/05\/20210529_3.png\" alt=\"\" class=\"wp-image-345\" srcset=\"https:\/\/www.gakujikai.com\/blog\/wp-content\/uploads\/2021\/05\/20210529_3.png 628w, https:\/\/www.gakujikai.com\/blog\/wp-content\/uploads\/2021\/05\/20210529_3-300x144.png 300w\" sizes=\"auto, (max-width: 628px) 100vw, 628px\"><\/figure><\/div>\n\n\n\n<p>\u4e0a\u8a18\u306e\u3088\u3046\u306b\u5c11\u3057\u610f\u5473\u3082\u89e3\u8aac\u3057\u307e\u3057\u305f\u304c\u3001\u3053\u3061\u3089\u306f\u771f\u3093\u4e2d\u306e\u7b26\u53f7\u304c\u5909\u308f\u308b\u3060\u3051\u306a\u306e\u3067\u7c21\u5358\u306b\u899a\u3048\u3089\u308c\u307e\u3059\u306d\u3002<\/p>\n\n\n\n<p>\u305d\u308c\u3067\u306f\u3053\u308c\u3089\u3092\u4f7f\u3063\u3066\u3044\u308d\u3044\u308d\u306a\u5f0f\u3092\u6c42\u3081\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-0\">\u500d\u89d2\u306e\u5f0f<\/h2>\n\n\n\n<p>\u500d\u89d2\u306e\u5f0f\u306f\u3001\u4e0a\u306e\u52a0\u6cd5\u5b9a\u7406\u306e\u5f0f\u306e\u03b2 \u3092\u03b1 \u306b\u5909\u3048\u308b\u3060\u3051\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u305d\u308c\u3067\u306f\u3084\u3063\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u307e\u305a\u306fsin\u306e\u5f0f\u304b\u3089<\/p>\n\n\n\n<div class=\"wp-block-image is-style-sango-with-border\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"487\" height=\"170\" src=\"https:\/\/www.gakujikai.com\/blog\/wp-content\/uploads\/2021\/05\/20210529_4.png\" alt=\"\" class=\"wp-image-346\" srcset=\"https:\/\/www.gakujikai.com\/blog\/wp-content\/uploads\/2021\/05\/20210529_4.png 487w, https:\/\/www.gakujikai.com\/blog\/wp-content\/uploads\/2021\/05\/20210529_4-300x105.png 300w\" sizes=\"auto, (max-width: 487px) 100vw, 487px\"><\/figure><\/div>\n\n\n\n<p>\u3053\u308c\u306f\u7c21\u5358\u3067\u3059\u306d\u3002\u3067\u306fcos \u306e\u5f0f\u306b\u3044\u3063\u3066\u307f\u307e\u3057\u3087\u3046\u3002 <\/p>\n\n\n\n<div class=\"wp-block-image is-style-sango-with-border\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"482\" height=\"182\" src=\"https:\/\/www.gakujikai.com\/blog\/wp-content\/uploads\/2021\/05\/20210529_5.png\" alt=\"\" class=\"wp-image-347\" srcset=\"https:\/\/www.gakujikai.com\/blog\/wp-content\/uploads\/2021\/05\/20210529_5.png 482w, https:\/\/www.gakujikai.com\/blog\/wp-content\/uploads\/2021\/05\/20210529_5-300x113.png 300w\" sizes=\"auto, (max-width: 482px) 100vw, 482px\"><\/figure><\/div>\n\n\n\n<p>\u3055\u3066\u3001cos \u306e\u65b9\u306f\u3053\u306e\u5f0f\u304b\u3089\u3082\u3046\u5c11\u3057\u5909\u5f62\u304c\u3042\u308a\u307e\u3059\u3002\u4e09\u89d2\u6bd4\u306e\u5358\u5143\u3067<br>\\(\\sin^2\\alpha+\\cos^2\\alpha=1\\)\u3068\u3044\u3046\u5f0f\u304c\u3042\u3063\u305f\u306e\u3092\u899a\u3048\u3066\u3044\u307e\u3059\u304b\uff1f<br>\u3053\u306e\u5f0f\u3092\u5909\u5f62\u3057\u3066\u3001\\(\\sin^2\\alpha=1-\\cos^2\\alpha\\)\u3068\u3057\u3066\u4ee3\u5165\u3059\u308b\u3068\u3001<\/p>\n\n\n\n<div class=\"wp-block-image is-style-sango-with-border\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"426\" height=\"176\" src=\"https:\/\/www.gakujikai.com\/blog\/wp-content\/uploads\/2021\/05\/20210529_6.png\" alt=\"\" class=\"wp-image-349\" srcset=\"https:\/\/www.gakujikai.com\/blog\/wp-content\/uploads\/2021\/05\/20210529_6.png 426w, https:\/\/www.gakujikai.com\/blog\/wp-content\/uploads\/2021\/05\/20210529_6-300x124.png 300w\" sizes=\"auto, (max-width: 426px) 100vw, 426px\"><\/figure><\/div>\n\n\n\n<p>\u3068\u3001\u306a\u308a\u307e\u3059\u306d\u3002\u3064\u307e\u308a\u3001cos\u3060\u3051\u3067\u8868\u305b\u308b\u308f\u3051\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u307e\u305f\u3001\u4eca\u5ea6\u306f\\(\\cos^2\\alpha=1-\\sin^2\\alpha\\)\u3068\u3057\u3066\u4ee3\u5165\u3059\u308b\u3068\u3001<\/p>\n\n\n\n<div class=\"wp-block-image is-style-sango-with-border\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"482\" height=\"185\" src=\"https:\/\/www.gakujikai.com\/blog\/wp-content\/uploads\/2021\/05\/20210529_7.png\" alt=\"\" class=\"wp-image-350\" 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class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"512\" height=\"240\" src=\"https:\/\/www.gakujikai.com\/blog\/wp-content\/uploads\/2021\/05\/20210529_8.png\" alt=\"\" class=\"wp-image-351\" srcset=\"https:\/\/www.gakujikai.com\/blog\/wp-content\/uploads\/2021\/05\/20210529_8.png 512w, https:\/\/www.gakujikai.com\/blog\/wp-content\/uploads\/2021\/05\/20210529_8-300x141.png 300w\" sizes=\"auto, (max-width: 512px) 100vw, 512px\"><\/figure><\/div>\n\n\n\n<p>\u307e\u305f\u3001\u534a\u89d2\u306e\u5f0f\u3068\u3057\u3066\u306f\\(\\alpha\\)\u3092\\(\\frac{\\alpha}{2} \\)\u306b\u5909\u3048\u3066<\/p>\n\n\n\n<div class=\"wp-block-image is-style-sango-with-border\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"328\" height=\"117\" src=\"https:\/\/www.gakujikai.com\/blog\/wp-content\/uploads\/2021\/05\/20210529_9.png\" alt=\"\" class=\"wp-image-352\" srcset=\"https:\/\/www.gakujikai.com\/blog\/wp-content\/uploads\/2021\/05\/20210529_9.png 328w, https:\/\/www.gakujikai.com\/blog\/wp-content\/uploads\/2021\/05\/20210529_9-300x107.png 300w\" sizes=\"auto, (max-width: 328px) 100vw, 328px\"><\/figure><\/div>\n\n\n\n<p>\u306e\u5f62\u3068\u3057\u3066\u3082\u4f7f\u308f\u308c\u307e\u3059\u3001\u4e0a\u306e\u5f0f\u3092\u5c0e\u3051\u308c\u3070\u554f\u984c\u306f\u306a\u3044\u3067\u3059\u306d\u3002<br>\u3055\u3066\u3001sin \u306e\u307b\u3046\u306f\u3001cos \u306e\u500d\u89d2\u306e\u5f0f\u306esin \u306e\u307b\u3046\u304b\u3089\u5909\u5f62\u3057\u3066<\/p>\n\n\n\n<div class=\"wp-block-image is-style-sango-with-border\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"554\" height=\"252\" src=\"https:\/\/www.gakujikai.com\/blog\/wp-content\/uploads\/2021\/05\/20210529_10.png\" alt=\"\" class=\"wp-image-354\" srcset=\"https:\/\/www.gakujikai.com\/blog\/wp-content\/uploads\/2021\/05\/20210529_10.png 554w, https:\/\/www.gakujikai.com\/blog\/wp-content\/uploads\/2021\/05\/20210529_10-300x136.png 300w\" sizes=\"auto, (max-width: 554px) 100vw, 554px\"><\/figure><\/div>\n\n\n\n\u540c\u3058\u3088\u3046\u306b\\(\\alpha\\)\u3092\\(\\frac{\\alpha}{2}\\)\u306b\u5909\u3048\u3066\n\n\n\n<div class=\"wp-block-image is-style-sango-with-border\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"342\" height=\"110\" src=\"https:\/\/www.gakujikai.com\/blog\/wp-content\/uploads\/2021\/05\/20210529_11.png\" alt=\"\" class=\"wp-image-355\" srcset=\"https:\/\/www.gakujikai.com\/blog\/wp-content\/uploads\/2021\/05\/20210529_11.png 342w, https:\/\/www.gakujikai.com\/blog\/wp-content\/uploads\/2021\/05\/20210529_11-300x96.png 300w\" sizes=\"auto, (max-width: 342px) 100vw, 342px\"><\/figure><\/div>\n\n\n\n<p>\u3068\u3044\u3046\u308f\u3051\u3067\u4eca\u56de\u306f\u500d\u89d2\u306e\u5f0f\u3068\u534a\u89d2\u306e\u5f0f\u3092\u52c9\u5f37\u3057\u307e\u3057\u305f\u3002<br>\u3053\u308c\u3089\u306e\u5f0f\u306f\u767b\u5834\u56de\u6570\u304c\u591a\u3044\u306e\u3067\u52c9\u5f37\u3057\u3066\u3044\u308c\u3070\u899a\u3048\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u304c\u3001\u899a\u3048\u304d\u308b\u307e\u3067\u3001\u307e\u305f\u4e0d\u5b89\u306b\u306a\u3063\u305f\u3068\u304d\u5c0e\u51fa\u3092\u899a\u3048\u3066\u3044\u308c\u3070\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u6b21\u56de\u306f\u7a4d\u548c\u306e\u5f0f\u3001\u548c\u7a4d\u306e\u5f0f\u3092\u5b66\u3073\u307e\u3057\u3087\u3046\u3002<br>\u7a4d\u548c\u306e\u5f0f\u3001\u548c\u7a4d\u306e\u5f0f\u306f\u7279\u306b\u5c0e\u51fa\u3092\u899a\u3048\u3066\u3057\u307e\u3048\u3070\u697d\u306b\u306a\u308a\u307e\u3059\u3002<br>\u79c1\u3082\u73fe\u5f79\u306e\u6642\u306f\u3063\u304d\u308a\u3068\u899a\u3048\u3066\u3044\u307e\u305b\u3093\u3067\u3057\u305f\u3002<br>\u7686\u3055\u3093\u3082\u305c\u3072\u5c0e\u51fa\u3092\u899a\u3048\u307e\u3057\u3087\u3046\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u307f\u306a\u3055\u3093\u3001\u65702 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