本文结合多年的教学实践,探讨了文[1]中两类“滑动”轨迹问题的极坐标解法,笔者认为此法不仅思维过程和运算过程均可得到简化,而且配合了教学的进度,学生只要具备极坐标的知识就能加以应用。文中阐明的用参、消参的规律和技巧,在解决类似的轨迹问题中也同样适用。为此我们先建立一个公 This paper combines many years of teaching practice to explore the polar coordinate solutions of the two types of “sliding” trajectories in [1]. The author believes that this method not only simplifies the thinking process and the calculation process, but also matches the progress of the teaching. Knowledge of polar coordinates can be applied. The rules and techniques for using parameters and parameters that are clarified in the text also apply to solving similar trajectory problems. For this we first establish a public