f(x)的图像始终在函数g(x)图像的上方
则f(x)>g(x)恒成立
[1+cos(2x+π/6)]/2>1/2*sin2x+a
1+cos(2x+π/6)>sin2x+2a
1+cos2x*√3/2-sin2x*1/2>sin2x+2a
3/2*sin2x-√3/2*cos2x
f(x)的图像始终在函数g(x)图像的上方
则f(x)>g(x)恒成立
[1+cos(2x+π/6)]/2>1/2*sin2x+a
1+cos(2x+π/6)>sin2x+2a
1+cos2x*√3/2-sin2x*1/2>sin2x+2a
3/2*sin2x-√3/2*cos2x