y=1/2sin(1/3x-π/6）怎样变到y=sinx?

y=1/2sin(1/3x-π/6）怎样变到y=sinx?
y=1/2sin(1/3x-π/6）怎样变到y=sinx?

y=1/2sin(1/3x-π/6）怎样变到y=sinx?
y=1/2sin(1/3x-π/6）
纵坐标伸长到原来的2倍,得到y=sin(1/3x-π/6)=sin(1/3(x-π/2))
向左平移π/2单位,得到y=sin(1/3x)
横坐标缩小到原来的1/3,得到y=sinx