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OpenStudy (anonymous):
Which set of rectangular coordinates describes the same location as the polar coordinates (4,3pi/2)?
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OpenStudy (anonymous):
\[\begin{cases}x=r\cos\theta\\ y=r\sin\theta\end{cases}~~\iff~~\begin{cases}x=4\cos\dfrac{3\pi}{2}\\\\ y=4\sin\dfrac{3\pi}{2}\end{cases}~~\iff~~\begin{cases}x=0\\\\ y=-4\end{cases}\]
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