f(x)=根号3cos^2x+1/2sin2x单调增、减区间.

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f(x)=根号3cos^2x+1/2sin2x单调增、减区间.
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f(x)=根号3cos^2x+1/2sin2x单调增、减区间.
f(x)=根号3cos^2x+1/2sin2x单调增、减区间.

f(x)=根号3cos^2x+1/2sin2x单调增、减区间.
f(x)=根号3cos^2x+1/2sin2x
=根号3/2*cos2x+1/2sin2x+根号3/2
=sin(2x+π/3)+根号3/2
y=sinx 递减区间 [2kπ+π/2,2kπ+3π/2]
y=sin(2x+π/3)+ 根号3/2
2kπ+π/2