{"url":"https://yamshing.hatenablog.com/entry/2019/10/18/232447","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fyamshing.hatenablog.com%2Fentry%2F2019%2F10%2F18%2F232447\" title=\"\u7d76\u5bfe\u306b\u5fd8\u308c\u306a\u3044\u548c\u7a4d\u306e\u516c\u5f0f\u306e\u899a\u3048\u65b9 - yamshing&#39;s diary\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_name":"yamshing","categories":["\u6570\u5b66\u516c\u5f0f\u899a\u3048\u65b9"],"width":"100%","height":"190","type":"rich","description":"\u548c\u7a4d\u306e\u516c\u5f0f\u306f\u3053\u3093\u306a\u3067\u3059\u3002 $$sinA+sinB=2\\sin \\frac {A+B}{2}\\cos \\frac {A-B}{2}$$ $$sinA-sinB=2\\cos\\frac {A+B}{2}\\sin \\frac {A-B}{2}$$ $$cosA+cosB=2\\cos\\frac {A+B}{2}\\cos\\frac {A-B}{2}$$ $$cosA-cosB=-2\\sin\\frac {A+B}{2}\\sin \\frac {A-B}{2}$$ \u3053\u308c\u3092\u3055\u3063\u3068\u899a\u3048\u308b\u306b\u306f\u3069\u3046\u3057\u305f\u3089\u826f\u3044\u3067\u3057\u3087\u3046\u304b\u3002 \u52a0\u6cd5\u5b9a\u7406\u304b\u3089\u5c0e\u304f\u3068\u3044\u3046\u306e\u3082\u3053\u306eA+B\u3068\u3044\u3046\u8b0e\u306e\u5909\u6570\u306e\u5909\u63db\u306b\u3088\u3063\u3066\u306a\u3093\u3060\u304b\u3088\u304f\u308f\u304b\u308a\u307e\u305b\u3093\u3002 \u3067\u306f\u3069\u2026","author_url":"https://blog.hatena.ne.jp/yamshing/","published":"2019-10-18 23:24:47","blog_url":"https://yamshing.hatenablog.com/","image_url":null,"provider_name":"Hatena Blog","version":"1.0","provider_url":"https://hatena.blog","blog_title":"yamshing's diary","title":"\u7d76\u5bfe\u306b\u5fd8\u308c\u306a\u3044\u548c\u7a4d\u306e\u516c\u5f0f\u306e\u899a\u3048\u65b9"}