本文探究双曲线切线的作法,自双曲线外一点所引切线的分布和切点弦的性质.下面先给出切线的一个定理.定理1双曲线的两个焦点,各自关于它所在支切线对称的点的轨迹,是以另一个焦点为圆心,实轴长为半径,且夹在各自焦点关于两条渐近线的对 This paper explores the hyperbolic tangent approach, the distribution of tangent lines introduced from a point outside the hyperbolic curve, and the nature of the tangent chord. A theorem of the tangent is given below. Theorem 1 The two focal points of the hyperbola, each relating to the tangent symmetry Of the trajectory is based on the other focus as the center, the real axis is a radius, and in their respective focus on the two asymptotic pairs