Posted by haifeng on 2017-12-29 11:22:53 last update 2020-12-07 11:21:55 | Answers (0) | 收藏
证明:
\[ \arcsin x+\frac{\pi}{2}=2\arctan\sqrt{\frac{1+x}{1-x}} \]
相关问题参考问题2048.