将F(X)=2Sin(2x +派/3)=2cos(π/2-2x-π/3)=2cos(π/6-2x)=2cos(2x-π/6) 所以 将F(X)向左移π/6就可以了 2cos(2(x+π/6)-π/6)=2cos(2x+π/6)=g(x)
