Posted by haifeng on 2023-11-28 10:48:49 last update 2023-11-28 15:55:42 | Answers (1) | 收藏
1. $\displaystyle\int\frac{2^{\arctan x}}{1+x^2}\mathrm{d}x$
2. $\displaystyle\int(\tan x)\ln\cos x\mathrm{d}x$
3. $\displaystyle\int\frac{\mathrm{d}x}{x^2\sqrt{4+x^2}}$
