一道高中三角函数题,莫名其妙就是算不出来在三角形ABC中,角A,B,C,的对边分别为a,b,c,且b/a=sin2C/sinA(1)若C=5/12π,求角B的大小.(2)若b=2,若b=2,π/3是卷子上的题出错了.....
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![一道高中三角函数题,莫名其妙就是算不出来在三角形ABC中,角A,B,C,的对边分别为a,b,c,且b/a=sin2C/sinA(1)若C=5/12π,求角B的大小.(2)若b=2,若b=2,π/3是卷子上的题出错了.....](/uploads/image/z/10331644-4-4.jpg?t=%E4%B8%80%E9%81%93%E9%AB%98%E4%B8%AD%E4%B8%89%E8%A7%92%E5%87%BD%E6%95%B0%E9%A2%98%2C%E8%8E%AB%E5%90%8D%E5%85%B6%E5%A6%99%E5%B0%B1%E6%98%AF%E7%AE%97%E4%B8%8D%E5%87%BA%E6%9D%A5%E5%9C%A8%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%AD%2C%E8%A7%92A%2CB%2CC%2C%E7%9A%84%E5%AF%B9%E8%BE%B9%E5%88%86%E5%88%AB%E4%B8%BAa%2Cb%2Cc%2C%E4%B8%94b%2Fa%EF%BC%9Dsin2C%2FsinA%EF%BC%881%EF%BC%89%E8%8B%A5C%EF%BC%9D5%2F12%CF%80%2C%E6%B1%82%E8%A7%92B%E7%9A%84%E5%A4%A7%E5%B0%8F.%EF%BC%882%EF%BC%89%E8%8B%A5b%EF%BC%9D2%2C%E8%8B%A5b%3D2%2C%CF%80%2F3%E6%98%AF%E5%8D%B7%E5%AD%90%E4%B8%8A%E7%9A%84%E9%A2%98%E5%87%BA%E9%94%99%E4%BA%86.....)
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