在做有关三角函数图像变换的题型时,由于“平移变换”与“伸缩变换”在“顺序”上的差别,直接会对图像平移量产生影响,所以同学们总是做不好,感觉很难.其实无论哪种变换,只要在变换过程中抓住x这个量,就容易了.下面我们共同来看一下两种变换的差异,并希望同学们在例题中体会“变量x”这个关键点. When doing the questions about trigonometric image transformation, the difference between “translation ” and “flexion ” in “order ” will directly affect the amount of image translation, so the students always In fact, no matter what kind of transform, as long as the amount of x in the transformation process to seize, it is easy. Below we look at the difference between the two transformations, and hope that students in the example of experience “Variable x ” this key point.