Badge
| Enlightened | First to answer and accepted with score of 10 or more. This badge can be awarded multiple times. |
y zhao earned this badge |
oct 21 at 13:03
Sum inequality: $\sum_{k=1}^n \frac{\sin k}{k} \le \pi-1$
| Enlightened | First to answer and accepted with score of 10 or more. This badge can be awarded multiple times. |
y zhao earned this badge |