问题

Questions in category: 重积分 (Multiple Integrals).

求 $\int_0^{\frac{\pi}{2}}\mathrm{d}\theta\int_0^R \sqrt{R^2-(r\cos\theta)^2}r\mathrm{d}r$.

Posted by haifeng on 2026-04-25 13:37:16 last update 2026-04-25 13:37:16 | Answers (2) | 收藏

求 $\int_0^{\frac{\pi}{2}}\mathrm{d}\theta\int_0^R \sqrt{R^2-(r\cos\theta)^2}r\mathrm{d}r$.