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在三角函数问题中,有一类与图象的对称轴有关的问题,在这类问题的求解过程中学生往往发生这样或那样的错误.下面举例证明.
In the trigonometric problem, there is a class of problems relating to the axis of symmetry of the image. In the process of solving such problems, students often have one or more mistakes.