Timeline for Prove/disprove $(\int_{0}^{2 \pi} \!\!\cos f(x) d x)^{2}+(\int_{0}^{2 \pi}\!\!\! \sqrt{(f'(x))^{2}+\sin ^{2} f(x)}dx)^{2}\ge 4\pi^{2}$
Current License: CC BY-SA 4.0
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| Jan 29, 2021 at 16:02 | comment | added | Todd Trimble | We're glad you're interested in mathematics, and hope you keep it up. For the most part, MO is for professionals and the community expects answers at a professional level, and this answer doesn't quite reach that level, hence the down-voting and votes to delete. Don't take it too much to heart, but for future reference, please be aware of the level. | |
| Jan 29, 2021 at 5:18 | review | Low quality posts | |||
| Jan 29, 2021 at 15:52 | |||||
| Jan 28, 2021 at 23:11 | review | First posts | |||
| Jan 29, 2021 at 12:58 | |||||
| Jan 28, 2021 at 23:10 | history | answered | Minh | CC BY-SA 4.0 |