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关于曲线切线的问题在近年来全国各地高考和各种竞赛试卷中屡见不鲜.本文将以四类曲线为例,探求当两条切线夹角为定角时的交点轨迹问题,在探求问题的过程中,笔者利用了齐次方程的思想方法,从而大大简化了运算量,并得出了一些较为简洁而理想的结果,愿和广大读者共同分享.1抛物线
The problem of curvilinear tangent is not uncommon in college entrance examination and all kinds of competition papers all over the country in recent years.This paper will take four kinds of curvilinear as an example to find out the intersection trajectory problem when the angle between two tangent lines is fixed angle, , I use the method of thinking of homogeneous equations, thus greatly simplifying the computation, and come to some of the more concise and the ideal result, is willing to share with the majority of readers .1 parabola