y=2*1/2[sin(2x+pi/3)+sin(pi/3)]-(3^.5)*(1-cos2x)/2+1/2*sin2x=sin(2x+pi/3)+(3^.5)/2-(3^.5)/2+(3^.5)/2*cos2x+1/2*sin2x=sin(2x+pi/2)+[sin(pi/3)cos2x+cos(pi/3)sin2x]=2sin(2x+pi/3)
