让2x+π/6分别去五个值0,π/2,π,3π/2,和2π,解得x的值分别为0,π/6,5π/12,2π/3,11π/12,做出五点（0,0）（π/6,1）,（5π/12,0）,（2π/3,-1）,（11π/12,0）,连线即可.有y=sinx图像上所有的点向左平移π/6个单...