求曲线的方程问题是高考中的热点和重点,在历年高考中出现的频率较高,特别是当今高考的改革以考查学生的创新意识为突破口,注重考查学生的逻辑思维能力,运算能力,分析问题和解决问题的能力,而轨迹方程这一热点,常涉及函数、三角、向量、几何等知识,能很好地反映学生在这些方面的掌握程度. The equation of the curve is the hot spot and focus of the college entrance examination in the college entrance examination over the years appear higher frequency, especially the reform of today’s college entrance examination to examine students ’innovative awareness as a breakthrough point, pay attention to examine students’ logical thinking ability, computing power, analysis Problem and the ability to solve problems. However, the hotspot of trajectory equation often involves knowledge of functions, trigonometry, vectors and geometry, which can well reflect students’ mastery of these aspects.