多年来,与椭圆、双曲线相关的焦点三角形PF1F2(P为曲线上的任意一点,F1与F2为曲线的焦点)中的边角关系是圆锥曲线问题中的基本题型,也是高考的热点内容之一,尤其是近几年的出题频率呈上升趋势.现列举部分典型试题说明其应用类型. For many years, the relationship between the ellipsoidal and hyperbolic related focus triangle PF1F2 (P is any point on the curve, F1 and F2 are the focal points of the curve) is the basic question in the conic curve problem, and it is also a hot content of the college entrance examination. One, especially in recent years, the frequency of questions is on the rise. Now enumerate some of the typical questions to illustrate the type of application.