问题

Questions in category: 导数及微分 (Derivatives and differentials).

证明: $\cos x < \frac{1}{x}$, $\forall\ x\in(0,\frac{\pi}{2})$.

Posted by haifeng on 2022-11-10 13:22:39 last update 2022-11-10 13:22:54 | Answers (0) | 收藏

证明: $\cos x < \frac{1}{x}$, $\forall\ x\in(0,\frac{\pi}{2})$.