【摘要】 讨论了二次曲线切线的几何性质,给出了二次曲线切线的几何作图方法,以及二次曲线切线的几何性质的若干应用.更多还原

【Abstract】 This paper aims at discussing the geometrical features of the conic tangent, the application of these features and its relevant cartographic methods.更多还原