아래와 같이 표현되는 매개변수방정식은?

• ①$x= \sin \theta$, $y= \sin 4 \theta$ ($0 \leq \theta \leq 2 \pi$)
• ②$x= \cos 2 \theta$, $y= \cos \theta$ ($0 \leq \theta \leq 2 \pi$)
• ③$x= \cos \theta$, $y= \cos 4 \theta -1$ ($0 \leq \theta \leq 2 \pi$)
• ④$x = \sin \theta$, $y= \sin 2 \theta$ ($0 \leq \theta \leq 2 \pi$)