Posted by haifeng on 2017-12-29 11:41:45 last update 2021-11-14 11:28:21 | Answers (3) | 收藏
计算不定积分
\[ \int\frac{2\sin x+\cos x}{\sin x+2\cos x}\mathrm{d}x \]
\[ \int\frac{\sin x}{\sin x+\cos x}\mathrm{d}x \]
