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在传统教学中讲授“三角函数的图象变换”时,教师在黑板上或学生在练习本上都只能通过有限的几组数据描点绘图,绘出的图往往与课本上的图象有较大的差异。现在借
When teaching “Transforming Images of Trigonometric Functions” in traditional teaching, the teacher can draw the drawing on the blackboard or in the exercise book only through a limited set of data, and the drawn pictures are often compared with the images on the textbook There is a big difference. Now borrow