$x=3\cos\theta \ , \ y=3\sin\theta \ , \ (0 \le \theta \le \pi)$

$x=3\cos\theta \ , \ y=3\sin\theta \ , \ (0 \le \theta \le \pi)$[br]https://min7014.github.io/math20240318001.html
– 민은기 (Min Eun Gi)

Information: $x=3\cos\theta \ , \ y=3\sin\theta \ , \ (0 \le \theta \le \pi)$