trigonometric formula – 小小泪

A Proof of Trigonometric Formulas in the Plane of Constant Curvature

作者 vanabel 发表于 12/12/2013 发表于数学笔记 Tagged with constant curvature, trigonometric formula

$\newcommand{\pr}{\left.\frac{\partial}{ …

A Proof of Trigonometric Formulas in the Plane of Constant Curvature Read more »