y=sin2x+√3cos2x =2*[sin2x*(1/2)+cos2x*(√3/2)] =2*[sin2x*cos(π/3)+cos2x*sin(π/3)] =2*sin[2x+(π/3)] =2cos（2x+π/3-π/2） =2cos[2(x-π/4)+π/3] 所以向右平移π/4个单位
