Precalculus
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Convert the point to rectangular coordinates.
(0,7π4)(0,\frac{7\pi}{4})(0,47π)
(0,74)(0,\frac74)(0,47)
(−4,0) (-4,0)(−4,0)
(0,0) (0,0)(0,0)
(0,7) (0,7)(0,7)