原式=√3sin(x+π/2)-sin(x+π)
=√3cosx+sinx
=2sin(x+π/3)
T=2π
已知函数f(x)已知函数f(x)=2√3sin(x/2+π/4)cos(x/2+π/4)-sin(x+π)求最小正周期
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