Answer
$x=r\cdot \cos{(\theta)}$, $y=r\cdot \sin{(\theta)}.$
Work Step by Step
We now from chapter 9.1 that if a point P with polar coordinates $(r,\theta)$, then its rectangular coordinates can be computed by: $x=r\cdot \cos{(\theta)}$, $y=r\cdot \sin{(\theta)}.$
