f(x)=根号3cosx/2-sinx/2
=2(根号3/2cosx/2-1/2sinx/2)
=2(cosπ/6cosx/2-sinπ/6sinx/2)
=2cos(π/6+x/2)
若x属于[-2π,2π],
则当x∈[-2π,-π/3]函数单调上升,x∈[-π/3,5π/3]函数单调下降,x∈[5π/3,2π]函数单调上升
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f(x)=根号3cosx/2-sinx/2
=2(根号3/2cosx/2-1/2sinx/2)
=2(cosπ/6cosx/2-sinπ/6sinx/2)
=2cos(π/6+x/2)
若x属于[-2π,2π],
则当x∈[-2π,-π/3]函数单调上升,x∈[-π/3,5π/3]函数单调下降,x∈[5π/3,2π]函数单调上升