Question 44
Prove the inequality
$$
\sin \frac{\pi}{4n} \ge \frac{\sqrt{2}}{2n},
$$
where $n$ is a positive integer.
$$
\sin \frac{\pi}{4n} \ge \frac{\sqrt{2}}{2n},
$$
where $n$ is a positive integer.
MathNet 2017-part-05 — 176 problems (EN–VI) Question 44
Math Olympiad Vault · MathNet 2017-part-05 — 176 problems (EN–VI)