y=sin(x+π/6)如何移动得到y=sin(2x+π/3)

问题描述:

y=sin(x+π/6)如何移动得到y=sin(2x+π/3)

y=sin(x+π/6)
1)将横坐标变为原来的1/2,得y=sin(2x+π/6)=sin[2(x+π/12)]
2)将横坐标向左平移π/12,得y=sin[2(x+π/12+π/12)]=sin(2x+π/3)