提问:要把y=sinx的图象变换为y=sin(ωx+φ)(ω>0,φ>0)的图象,可以先将y=sinx的图象向左平移φ个单位,再将每个点的横坐标伸缩为原来的1/ω;也可以先将y=sinx每个点的横坐标伸缩为原来的1/ω,再将图象向左平移φω个单位.这两种变换方法只是平移和伸缩 Question: To transform an image of y=sinx into an image with y=sin(ωx+φ)(ω>0, φ>0), you can first translate the image of y=sinx to the left by φ units. The horizontal axis of each point is scaled to the original 1/ω; it is also possible to first scale the horizontal axis of each point of y=sinx to the original 1/ω, and then shift the image to the left by φω units. Transform method is just translation and scaling