1、asin60°cos60°+√3cos120°=0
a√3/2×1/2-√3/2=0
a=2
2、f(x)=2sinx*cosx+√3cos2x
=sin2x+√3cos2x
=2(1/2sin2x+√3/2cos2x)
=2sin(2x+π/6)
∴f(x)的最大值是2
1、asin60°cos60°+√3cos120°=0
a√3/2×1/2-√3/2=0
a=2
2、f(x)=2sinx*cosx+√3cos2x
=sin2x+√3cos2x
=2(1/2sin2x+√3/2cos2x)
=2sin(2x+π/6)
∴f(x)的最大值是2