Question

将函数y=sin(2x+π/3)的图像上所有的点向右平移π/6 再将所有点的横坐标变为原来的1/2倍，则所得的解析式

Answer 1

y=sin(2x+π/3)--y=sin[2(x+π/6)]右移π/6得到y=sin[2(x+π/6+π/6)]=sin[2x+2π/3]，横坐标变为1/2，函数的周期小了，w变大（乘以2）变为y=sin(4x+2π/3)