Posted by haifeng on 2014-11-11 22:00:41 last update 2014-11-11 22:05:44 | Answers (1) | 收藏
求
\[\int\frac{1}{\sin^2 x\cos x}dx.\]
[Hint]
\[ \int\frac{1}{\sin^2 x\cos x}dx=\int\sec x\csc^2 xdx=-\int\sec x d\cot x \]
然后用分部积分.
