(1)∵f(x)=cos(2x- π 3 )+sin(2x- π 6 )+2cos 2 x=cos2xcos π 3 +sin2xsin π 3 +sin2xcos π 6 -cos2xsin π 6 +cos2x+1=sin2x...
已知函数 f(x)=cos(2x- π 3 )+sin(2x- π 6 )+2co s 2 x
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