用双曲线第二定义画双曲线

To Paint Hyperbola with Hyperbolic Second Definition

本文介绍一种按双曲线第二定义手工绘制双曲线的方法。它高效准确,能直观反映双曲线形成的轨迹,适合任意双曲线方程。

This paper introduces a kind of method,i.e.hand-painted hyperbola with hyperbolic second definition.It is effective and accurate,and can directly show the track of the formation of hyperbola,which is suitable for any hyperbolic equation.