已知函数f(x)=根号3×sin(x/4)cos(x/4)+(cosx/4)^2(1)若f(x)=1,求cos(2派/3-x)的值(2)在ABC中,角A,B,C的对边分别是a,b,c,且满足acosC+1/2c=b,求f(B)的取值范围
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![已知函数f(x)=根号3×sin(x/4)cos(x/4)+(cosx/4)^2(1)若f(x)=1,求cos(2派/3-x)的值(2)在ABC中,角A,B,C的对边分别是a,b,c,且满足acosC+1/2c=b,求f(B)的取值范围](/uploads/image/z/2095400-56-0.jpg?t=%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%28x%29%EF%BC%9D%E6%A0%B9%E5%8F%B73%C3%97sin%28x%2F4%29cos%28x%2F4%29%EF%BC%8B%28cosx%2F4%29%EF%BC%BE2%EF%BC%881%EF%BC%89%E8%8B%A5f%28x%29%3D1%2C%E6%B1%82cos%EF%BC%882%E6%B4%BE%2F3-x%EF%BC%89%E7%9A%84%E5%80%BC%EF%BC%882%EF%BC%89%E5%9C%A8ABC%E4%B8%AD%2C%E8%A7%92A%2CB%2CC%E7%9A%84%E5%AF%B9%E8%BE%B9%E5%88%86%E5%88%AB%E6%98%AFa%2Cb%2Cc%2C%E4%B8%94%E6%BB%A1%E8%B6%B3acosC%2B1%2F2c%3Db%2C%E6%B1%82f%28B%29%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4)
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