{"id":5160,"date":"2024-12-27T17:33:49","date_gmt":"2024-12-27T08:33:49","guid":{"rendered":"https:\/\/torisetudy.com\/?p=5160"},"modified":"2026-03-09T17:46:19","modified_gmt":"2026-03-09T08:46:19","slug":"%e5%8a%a0%e6%b3%95%e5%ae%9a%e7%90%86","status":"publish","type":"post","link":"https:\/\/torisetudy.com\/?p=5160","title":{"rendered":"\u52a0\u6cd5\u5b9a\u7406"},"content":{"rendered":"\n<div id=\"toc_container\" class=\"no_bullets\"><p class=\"toc_title\">\u76ee\u6b21<\/p><ul class=\"toc_list\"><li><a href=\"#i\"><span class=\"toc_number toc_depth_1\">1<\/span> \u52a0\u6cd5\u5b9a\u7406<\/a><\/li><li><a href=\"#i-2\"><span class=\"toc_number toc_depth_1\">2<\/span> \u500d\u89d2\u516c\u5f0f<\/a><\/li><li><a href=\"#i-3\"><span class=\"toc_number toc_depth_1\">3<\/span> \u534a\u89d2\u516c\u5f0f<\/a><\/li><li><a href=\"#i-4\"><span class=\"toc_number toc_depth_1\">4<\/span> \uff13\u500d\u89d2\u516c\u5f0f<\/a><\/li><\/ul><\/div>\n<h2 class=\"wp-block-heading\"><span id=\"i\">\u52a0\u6cd5\u5b9a\u7406<\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u548c\u3084\u5dee\u306b\u3064\u3044\u3066<\/h3>\n\n\n\n<p>2\u3064\u306e\u89d2\u306e\u548c\u3084\u5dee\u306e\u4e09\u89d2\u95a2\u6570\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p>$$\\cos\\left(\\bun{\\pi}{2}-\\bun{\\pi}{3}\\right)=\\cos\\Bun{\\pi}{6}$$\u3068\u8a08\u7b97\u3067\u304d\u307e\u3059\u304c\uff0c<\/p>\n\n\n\n<p>$$\\cos\\left(\\bun{\\pi}{2}-\\bun{\\pi}{3}\\right)=\\cos\\Bun{\\pi}{2}-\\cos\\bun{\\pi}{3}\\stext{\\quad\u2026\\ \u2606}$$\u306f\u6210\u308a\u7acb\u3064\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n\n\n\n<div class=\"st-kaiwa-box kaiwaicon4 clearfix\"><div class=\"st-kaiwa-area2\"><div class=\"st-kaiwa-hukidashi2\"><div class=\"wp-block-st-blocks-st-kaiwa\">\n<p>\u5b9f\u969b\u306b\u8a08\u7b97\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div><\/div><\/div><div class=\"st-kaiwa-face2\"><img decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" data-src=\"https:\/\/torisetudy.com\/wp-content\/uploads\/2022\/07\/\u751f\u5f92\uff08\u5b66\u7fd2\uff09.png\" width=\"60px\"><noscript><img decoding=\"async\" src=\"https:\/\/torisetudy.com\/wp-content\/uploads\/2022\/07\/\u751f\u5f92\uff08\u5b66\u7fd2\uff09.png\" width=\"60px\"><\/noscript><div class=\"st-kaiwa-face-name2\">\u751f\u5f92<\/div><\/div><\/div>\n\n\n\n<p>$$\\begin{aligned} &amp;\\cos\\left(\\bun{\\pi}{2}-\\bun{\\pi}{3}\\right)=\\cos\\bun{\\pi}{6}=\\bun{\\sqrt{3}}{2}\\\\ &amp;\\cos\\bun{\\pi}{2}-\\cos\\bun{\\pi}{3}=0-\\bun12=-\\Bun12 \\end{aligned}$$\u3067\u3059\u304b\u3089\uff0c\u2606\u306f\u6210\u308a\u7acb\u3061\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>\u4e00\u822c\u7684\u306b\uff0c<\/p>\n\n\n\n<p>$$\\cos(\\alpha-\\beta)=\\cos\\alpha-\\cos\\beta$$ \u306f\u6210\u308a\u7acb\u305f\u306a\u3044\u306e\u3067\u3059\u304c\uff0c\u305d\u308c\u3067\u306f $\\cos(\\alpha-\\beta)$ \u306f\u3069\u306e\u3088\u3046\u306b\u8868\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u306e\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n\n\n\n<p>$\\cos$ \u3060\u3051\u3067\u306a\u304f\uff0c\u4ed6\u306e $\\sin$ \u3084 $\\tan$ \u306b\u3064\u3044\u3066\u3082\uff0c\u6b21\u306e\u5b9a\u7406\u304c\u6210\u308a\u7acb\u3061\u307e\u3059\u3002\u3053\u306e\u5b9a\u7406\u3092<span class=\"st-mymarker-s\">\u52a0\u6cd5\u5b9a\u7406<\/span>\u3068\u3044\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"st-kaiwa-box kaiwaicon1 clearfix\"><div class=\"st-kaiwa-face\"><img decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" data-src=\"https:\/\/torisetudy.com\/wp-content\/uploads\/2022\/07\/\u5b8c\u6210\u30a2\u30a4\u30b3\u30f3.png\" width=\"60px\"><noscript><img decoding=\"async\" src=\"https:\/\/torisetudy.com\/wp-content\/uploads\/2022\/07\/\u5b8c\u6210\u30a2\u30a4\u30b3\u30f3.png\" width=\"60px\"><\/noscript><div class=\"st-kaiwa-face-name\">\u7fbd\u767d<\/div><\/div><div class=\"st-kaiwa-area\"><div class=\"st-kaiwa-hukidashi\"><div class=\"wp-block-st-blocks-st-kaiwa\">\n<p>\u4e09\u89d2\u95a2\u6570\u3067\u6700\u3082\u91cd\u8981\u306a\u5b9a\u7406\u3068\u3044\u3063\u3066\u3082\u904e\u8a00\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u7269\u7406\u3067\u306f\u305d\u3053\u307e\u3067\u4f7f\u7528\u983b\u5ea6\u306f\u9ad8\u304f\u306a\u3044\u3067\u3059\u304c\u2026\u3002<\/p>\n<\/div><\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-st-blocks-my-box st-mybox has-title post-hashiro-point\" style=\"background-color:#fff;border-color:#ff7f50\"><p class=\"st-mybox-title\" style=\"color:#ff7f50;font-weight:bold;text-shadow:#fff 3px 0px 0px, #fff 2.83487px .981584px 0px, #fff 2.35766px 1.85511px 0px, #fff 1.62091px 2.52441px 0px, #fff .705713px 2.91581px 0px, #fff -0.287171px 2.98622px 0px, #fff -1.24844px 2.72789px 0px, #fff -2.07227px 2.16926px 0px, #fff -2.66798px 1.37182px 0px, #fff -2.96998px .42336px 0px, #fff -2.94502px -0.571704px 0px, #fff -2.59586px -1.50383px 0px, #fff -1.96093px -2.27041px 0px, #fff -1.11013px -2.78704px 0px, #fff -0.137119px -2.99686px 0px, #fff .850987px -2.87677px 0px, #fff 1.74541px -2.43999px 0px, #fff 2.44769px -1.73459px 0px, #fff 2.88051px -0.838246px 0px;background:linear-gradient(0deg, #fff 0%, #fff 55%, rgba(0, 0, 0, 0) 55%, rgba(0, 0, 0, 0) 100%)\"><i class=\"st-fa st-svg-lightbulb-o st-css-no\" aria-hidden=\"\"><\/i>\u52a0\u6cd5\u5b9a\u7406<\/p><div class=\"st-in-mybox\">\n<p>\u89d2\u5ea6\u306e\u548c\u3084\u5dee\u306b\u3064\u3044\u3066\uff0c\u4ee5\u4e0b\u304c\u6210\u308a\u7acb\u3064\u3002<\/p>\n\n\n\n<p>$$\\begin{aligned}\\sin(\\alpha+\\beta)&amp;=\\sin\\alpha\\cos\\beta+\\cos\\alpha\\sin\\beta\\stext{\\quad\u2026\\ \u2460}\\\\ \\sin(\\alpha-\\beta)&amp;=\\sin\\alpha\\cos\\beta-\\cos\\alpha\\sin\\beta\\stext{\\quad\u2026\\ \u2461}\\\\ \\cos(\\alpha+\\beta)&amp;=\\cos\\alpha\\cos\\beta-\\sin\\alpha\\sin\\beta\\stext{\\quad\u2026\\ \u2462}\\\\ \\cos(\\alpha-\\beta)&amp;=\\cos\\alpha\\cos\\beta+\\sin\\alpha\\sin\\beta\\stext{\\quad\u2026\\ \u2463}\\\\ \\tan(\\alpha+\\beta)&amp;=\\bun{\\tan\\alpha+\\tan\\beta}{1-\\tan\\alpha\\tan\\beta}\\stext{\\quad\u2026\\ \u2464}\\\\ \\tan(\\alpha-\\beta)&amp;=\\bun{\\tan\\alpha-\\tan\\beta}{1+\\tan\\alpha\\tan\\beta}\\stext{\\quad\u2026\\ \u2465} \\end{aligned}$$<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-st-blocks-memo clip-memobox has-icon-label post-hashiro-memo\" style=\"color:#000;background-color:#eeeeee\"><div class=\"clip-fonticon\" style=\"color:#919191;border-color:#9191914d\"><i class=\"st-fa st-svg-file-text-o st-css-no\" data-icon-label=\"memo\" aria-hidden=\"\"><\/i><\/div><div class=\"clip-memotext\" style=\"color:#000\">\n<p class=\"has-no-st-margin-bottom has-text-color\" style=\"color:#666666\">\u8a3c\u660e\u306f\u66f8\u7c4d\u300c\u6570\u5b66\u306e\u30c8\u30ea\u30bb\u30c4\u300d\u306e\u6f14\u7fd2\u554f\u984c\u3067\u6271\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span id=\"i-2\">\u500d\u89d2\u516c\u5f0f<\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u52a0\u6cd5\u5b9a\u7406\u3092\u7528\u3044\u3066<\/h3>\n\n\n\n<p>\u52a0\u6cd5\u5b9a\u7406\u306e \u2460\uff0c\u2462\uff0c\u2464 \u306b\u304a\u3044\u3066\uff0c$\\alpha=\\beta=\\theta$ \u3068\u3059\u308b\u3068\uff0c\u4e0b\u8a18\u306e\u500d\u89d2\uff08\uff12\u500d\u89d2\uff09\u306e\u516c\u5f0f\u304c\u5f97\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-st-blocks-my-box st-mybox has-title post-hashiro-point\" style=\"background-color:#fff;border-color:#ff7f50\"><p class=\"st-mybox-title\" style=\"color:#ff7f50;font-weight:bold;text-shadow:#fff 3px 0px 0px, #fff 2.83487px .981584px 0px, #fff 2.35766px 1.85511px 0px, #fff 1.62091px 2.52441px 0px, #fff .705713px 2.91581px 0px, #fff -0.287171px 2.98622px 0px, #fff -1.24844px 2.72789px 0px, #fff -2.07227px 2.16926px 0px, #fff -2.66798px 1.37182px 0px, #fff -2.96998px .42336px 0px, #fff -2.94502px -0.571704px 0px, #fff -2.59586px -1.50383px 0px, #fff -1.96093px -2.27041px 0px, #fff -1.11013px -2.78704px 0px, #fff -0.137119px -2.99686px 0px, #fff .850987px -2.87677px 0px, #fff 1.74541px -2.43999px 0px, #fff 2.44769px -1.73459px 0px, #fff 2.88051px -0.838246px 0px;background:linear-gradient(0deg, #fff 0%, #fff 55%, rgba(0, 0, 0, 0) 55%, rgba(0, 0, 0, 0) 100%)\"><i class=\"st-fa st-svg-lightbulb-o st-css-no\" aria-hidden=\"\"><\/i>\u500d\u89d2\u516c\u5f0f<\/p><div class=\"st-in-mybox\">\n<p>\u4ee5\u4e0b\u306e\u95a2\u4fc2\u5f0f\u304c\u6210\u7acb\u3059\u308b\u3002<\/p>\n\n\n\n<p class=\"has-st-margin-bottom has-st-margin-bottom--1\">$$\\begin{aligned} \\sin2\\theta&amp;=2\\sin\\theta\\cos\\theta\\\\ \\cos2\\theta&amp;=\\cos^2\\theta-\\sin^2\\theta\\\\&amp;=2\\cos^2\\theta-1\\\\&amp;=1-2\\sin^2\\theta\\\\ \\tan2\\theta&amp;=\\bun{2\\tan\\theta}{1-\\tan^2\\theta} \\end{aligned}$$<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"st-kaiwa-box kaiwaicon4 clearfix\"><div class=\"st-kaiwa-area2\"><div class=\"st-kaiwa-hukidashi2\"><div class=\"wp-block-st-blocks-st-kaiwa\">\n<p>\u8a3c\u660e\u3082\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div><\/div><\/div><div class=\"st-kaiwa-face2\"><img decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" data-src=\"https:\/\/torisetudy.com\/wp-content\/uploads\/2022\/07\/\u751f\u5f92\uff08\u5b66\u7fd2\uff09.png\" width=\"60px\"><noscript><img decoding=\"async\" src=\"https:\/\/torisetudy.com\/wp-content\/uploads\/2022\/07\/\u751f\u5f92\uff08\u5b66\u7fd2\uff09.png\" width=\"60px\"><\/noscript><div class=\"st-kaiwa-face-name2\">\u751f\u5f92<\/div><\/div><\/div>\n\n\n\n<p>$\\cos(\\alpha+\\beta)=\\cos\\alpha\\cos\\beta-\\sin\\alpha\\sin\\beta$ \u306e\u4e21\u8fba\u306b\uff0c$\\alpha=\\beta=\\theta$ \u3092\u4ee3\u5165\u3057\u3066\uff0c<\/p>\n\n\n\n<p>$$\\begin{aligned} \\cos(\\theta+\\theta)&amp;=\\cos\\theta\\cos\\theta-\\sin\\theta\\sin\\theta\\\\ \\cos2\\theta&amp;=\\cos^2\\theta-\\sin^2\\theta\\stext{\\quad\u2026\\ \u2606} \\end{aligned}$$<\/p>\n\n\n\n<p>\u2606\u306b\u304a\u3044\u3066\uff0c$\\sin^2\\theta=1-\\cos^2\\theta$ \u3068\u3059\u308b\u3068\uff0c<\/p>\n\n\n\n<p>$$\\begin{aligned} \\cos2\\theta&amp;=\\cos^2\\theta-(1-\\cos^2\\theta)\\\\ &amp;=2\\cos^2\\theta-1 \\end{aligned}$$<\/p>\n\n\n\n<p>\u2606\u306b\u304a\u3044\u3066\uff0c$\\cos^2\\theta=1-\\sin^2\\theta$ \u3068\u3059\u308b\u3068\uff0c<\/p>\n\n\n\n<p>$$\\begin{aligned} \\cos2\\theta&amp;=1-\\sin^2\\theta-\\sin^2\\theta\\\\ &amp;=1-2\\sin^2\\theta \\end{aligned}$$<\/p>\n\n\n\n<div class=\"st-kaiwa-box kaiwaicon3 clearfix\"><div class=\"st-kaiwa-area2\"><div class=\"st-kaiwa-hukidashi2\"><div class=\"wp-block-st-blocks-st-kaiwa\">\n<p>$\\cos$ \u306e\u516c\u5f0f\u306f\u3053\u308c\u3067ok\uff01<\/p>\n<\/div><\/div><\/div><div class=\"st-kaiwa-face2\"><img decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" data-src=\"https:\/\/torisetudy.com\/wp-content\/uploads\/2022\/07\/\u751f\u5f92\uff08\u6319\u624b\uff09.png\" width=\"60px\"><noscript><img decoding=\"async\" src=\"https:\/\/torisetudy.com\/wp-content\/uploads\/2022\/07\/\u751f\u5f92\uff08\u6319\u624b\uff09.png\" width=\"60px\"><\/noscript><div class=\"st-kaiwa-face-name2\">\u751f\u5f92<\/div><\/div><\/div>\n\n\n\n<p>$\\sin2\\theta$\uff0c$\\tan2\\theta$ \u3082\u540c\u69d8\u306b\u793a\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u624b\u3092\u52d5\u304b\u3057\u3066\u78ba\u8a8d\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span id=\"i-3\">\u534a\u89d2\u516c\u5f0f<\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\uff12\u500d\u89d2\u306e\u516c\u5f0f\u3092\u7528\u3044\u3066<\/h3>\n\n\n\n<p>\uff12\u500d\u89d2\u306e\u516c\u5f0f\u3088\u308a\uff0c\u4ee5\u4e0b\u306e\u534a\u89d2\u516c\u5f0f\u3092\u5c0e\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-st-blocks-my-box st-mybox has-title post-hashiro-point\" style=\"background-color:#fff;border-color:#ff7f50\"><p class=\"st-mybox-title\" style=\"color:#ff7f50;font-weight:bold;text-shadow:#fff 3px 0px 0px, #fff 2.83487px .981584px 0px, #fff 2.35766px 1.85511px 0px, #fff 1.62091px 2.52441px 0px, #fff .705713px 2.91581px 0px, #fff -0.287171px 2.98622px 0px, #fff -1.24844px 2.72789px 0px, #fff -2.07227px 2.16926px 0px, #fff -2.66798px 1.37182px 0px, #fff -2.96998px .42336px 0px, #fff -2.94502px -0.571704px 0px, #fff -2.59586px -1.50383px 0px, #fff -1.96093px -2.27041px 0px, #fff -1.11013px -2.78704px 0px, #fff -0.137119px -2.99686px 0px, #fff .850987px -2.87677px 0px, #fff 1.74541px -2.43999px 0px, #fff 2.44769px -1.73459px 0px, #fff 2.88051px -0.838246px 0px;background:linear-gradient(0deg, #fff 0%, #fff 55%, rgba(0, 0, 0, 0) 55%, rgba(0, 0, 0, 0) 100%)\"><i class=\"st-fa st-svg-lightbulb-o st-css-no\" aria-hidden=\"\"><\/i>\u534a\u89d2\u516c\u5f0f<\/p><div class=\"st-in-mybox\">\n<p>\u4ee5\u4e0b\u306e\u95a2\u4fc2\u5f0f\u304c\u6210\u7acb\u3059\u308b\u3002<\/p>\n\n\n\n<p class=\"has-st-margin-bottom has-st-margin-bottom--1\">$$\\begin{aligned} \\sin^2\\bun{\\theta}{2}&amp;=\\bun{1-\\cos\\theta}{2}\\\\ \\cos^2\\bun{\\theta}{2}&amp;=\\bun{1+\\cos\\theta}{2}\\\\ \\tan^2\\bun{\\theta}{2}&amp;=\\bun{1-\\cos\\theta}{1+\\cos\\theta} \\end{aligned}$$<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"st-kaiwa-box kaiwaicon4 clearfix\"><div class=\"st-kaiwa-area2\"><div class=\"st-kaiwa-hukidashi2\"><div class=\"wp-block-st-blocks-st-kaiwa\">\n<p>\u8a3c\u660e\u3057\u3066\u3044\u304d\u307e\u3059\uff01<\/p>\n<\/div><\/div><\/div><div class=\"st-kaiwa-face2\"><img decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" data-src=\"https:\/\/torisetudy.com\/wp-content\/uploads\/2022\/07\/\u751f\u5f92\uff08\u5b66\u7fd2\uff09.png\" width=\"60px\"><noscript><img decoding=\"async\" src=\"https:\/\/torisetudy.com\/wp-content\/uploads\/2022\/07\/\u751f\u5f92\uff08\u5b66\u7fd2\uff09.png\" width=\"60px\"><\/noscript><div class=\"st-kaiwa-face-name2\">\u751f\u5f92<\/div><\/div><\/div>\n\n\n\n<p>\u500d\u89d2\u516c\u5f0f\u3092\u5229\u7528\u3057\u307e\u3059\u3002$\\cos2\\theta=1-2\\sin^2\\theta$ \u3088\u308a\uff0c<\/p>\n\n\n\n<p>$$\\sin^2\\theta=\\Bun{1-\\cos2\\theta}{2}$$\u304c\u6210\u7acb\u3057\u307e\u3059\u3002$\\theta$ \u3092 $\\bun{\\theta}{2}$ \u3068\u3059\u308b\u3068\uff0c<\/p>\n\n\n\n<p>$$\\sin^2\\bun{\\theta}{2}=\\bun{1-\\cos\\theta}{2}$$\u304c\u5f97\u3089\u308c\u307e\u3059\u306d\u3002<\/p>\n\n\n\n<p>\u540c\u69d8\u306b\uff0c$\\cos2\\theta=2\\cos^2\\theta-1$ \u3088\u308a\uff0c<\/p>\n\n\n\n<p>$$\\cos^2\\theta=\\bun{1+\\cos2\\theta}{2}$$\u304c\u6210\u7acb\u3057\u307e\u3059\u3002$\\theta$ \u3092 $\\bun{\\theta}{2}$ \u3068\u3059\u308b\u3068\uff0c<\/p>\n\n\n\n<p>$$\\cos^2\\bun{\\theta}{2}=\\bun{1+\\cos\\theta}{2}$$\u304c\u5f97\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p>$\\tan^2\\bun{\\theta}{2}$ \u306b\u3064\u3044\u3066\u306f\uff0c<\/p>\n\n\n\n<p>$$\\begin{aligned}\\tan^2\\bun{\\theta}{2}&amp;=\\bun{\\sin^2\\Bun{\\theta}{2}}{\\cos^2\\Bun{\\theta}{2}}\\\\ &amp;=\\bun{\\Bun{1-\\cos\\theta}{2}}{\\Bun{1+\\cos\\theta}{2}}\\\\ &amp;=\\bun{1-\\cos\\theta}{1+\\cos\\theta}\\end{aligned}$$\u3068\u5909\u5f62\u3059\u308c\u3070ok\u3067\u3059\u306d\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span id=\"i-4\">\uff13\u500d\u89d2\u516c\u5f0f<\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u7c21\u5358\u306a\u5c0e\u51fa<\/h3>\n\n\n\n<p>\u52a0\u6cd5\u5b9a\u7406\u306e \u2460\uff0c\u2462 \u306b\u304a\u3044\u3066\uff0c$\\alpha=\\theta$\uff0c$\\beta=2\\theta$ \u3068\u3059\u308b\u3068\uff0c\u4ee5\u4e0b\u306e\uff13\u500d\u89d2\u306e\u516c\u5f0f\u304c\u5f97\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-st-blocks-my-box st-mybox has-title post-hashiro-point\" style=\"background-color:#fff;border-color:#ff7f50\"><p class=\"st-mybox-title\" style=\"color:#ff7f50;font-weight:bold;text-shadow:#fff 3px 0px 0px, #fff 2.83487px .981584px 0px, #fff 2.35766px 1.85511px 0px, #fff 1.62091px 2.52441px 0px, #fff .705713px 2.91581px 0px, #fff -0.287171px 2.98622px 0px, #fff -1.24844px 2.72789px 0px, #fff -2.07227px 2.16926px 0px, #fff -2.66798px 1.37182px 0px, #fff -2.96998px .42336px 0px, #fff -2.94502px -0.571704px 0px, #fff -2.59586px -1.50383px 0px, #fff -1.96093px -2.27041px 0px, #fff -1.11013px -2.78704px 0px, #fff -0.137119px -2.99686px 0px, #fff .850987px -2.87677px 0px, #fff 1.74541px -2.43999px 0px, #fff 2.44769px -1.73459px 0px, #fff 2.88051px -0.838246px 0px;background:linear-gradient(0deg, #fff 0%, #fff 55%, rgba(0, 0, 0, 0) 55%, rgba(0, 0, 0, 0) 100%)\"><i class=\"st-fa st-svg-lightbulb-o st-css-no\" aria-hidden=\"\"><\/i>\uff13\u500d\u89d2\u306e\u516c\u5f0f<\/p><div class=\"st-in-mybox\">\n<p>\u4ee5\u4e0b\u306e\u95a2\u4fc2\u5f0f\u304c\u6210\u7acb\u3059\u308b\u3002<\/p>\n\n\n\n<p class=\"has-st-margin-bottom has-st-margin-bottom--1\">$$\\begin{aligned} &amp;\\sin3\\theta=3\\sin\\theta-4\\sin^3\\theta\\\\ &amp;\\cos3\\theta=4\\cos^3\\theta-3\\cos\\theta \\end{aligned}$$<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"st-kaiwa-box kaiwaicon1 clearfix\"><div class=\"st-kaiwa-face\"><img decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" data-src=\"https:\/\/torisetudy.com\/wp-content\/uploads\/2022\/07\/\u5b8c\u6210\u30a2\u30a4\u30b3\u30f3.png\" width=\"60px\"><noscript><img decoding=\"async\" src=\"https:\/\/torisetudy.com\/wp-content\/uploads\/2022\/07\/\u5b8c\u6210\u30a2\u30a4\u30b3\u30f3.png\" width=\"60px\"><\/noscript><div class=\"st-kaiwa-face-name\">\u7fbd\u767d<\/div><\/div><div class=\"st-kaiwa-area\"><div class=\"st-kaiwa-hukidashi\"><div class=\"wp-block-st-blocks-st-kaiwa\">\n<p>\uff13\u500d\u89d2\u306e\u516c\u5f0f\u304c\u7269\u7406\u3067\u51fa\u3066\u304f\u308b\u3053\u3068\u306f\u6975\u3081\u3066\u7a00\u3067\u3059\u306e\u3067\uff0c\u3053\u3053\u3067\u306f\u7121\u7406\u3057\u3066\u899a\u3048\u306a\u304f\u3066ok\u3067\u3059\u3002<\/p>\n<\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u76ee\u6b211 \u52a0\u6cd5\u5b9a\u74062 \u500d\u89d2\u516c\u5f0f3 \u534a\u89d2\u516c\u5f0f4 \uff13\u500d\u89d2\u516c\u5f0f \u52a0\u6cd5\u5b9a\u7406 \u548c\u3084\u5dee\u306b\u3064\u3044\u3066 2\u3064\u306e\u89d2\u306e\u548c\u3084\u5dee\u306e\u4e09\u89d2\u95a2\u6570\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002 $$\\cos\\left(\\bun{\\pi}{2}-\\bun{\\pi}{ &#8230; <\/p>\n","protected":false},"author":1,"featured_media":5148,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[33,32],"tags":[],"class_list":["post-5160","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-trigonometry","category-32"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/torisetudy.com\/index.php?rest_route=\/wp\/v2\/posts\/5160"}],"collection":[{"href":"https:\/\/torisetudy.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/torisetudy.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/torisetudy.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/torisetudy.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5160"}],"version-history":[{"count":20,"href":"https:\/\/torisetudy.com\/index.php?rest_route=\/wp\/v2\/posts\/5160\/revisions"}],"predecessor-version":[{"id":5260,"href":"https:\/\/torisetudy.com\/index.php?rest_route=\/wp\/v2\/posts\/5160\/revisions\/5260"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/torisetudy.com\/index.php?rest_route=\/wp\/v2\/media\/5148"}],"wp:attachment":[{"href":"https:\/\/torisetudy.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5160"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/torisetudy.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5160"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/torisetudy.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5160"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}