Answer
$(0,4)$
Work Step by Step
Step 1. See plot. Move to $\theta=-\frac{\pi}{2}$, then $r=-4$ to get the point.
Step 2. Using the formulas $x=r\ cos\theta$ and $y=r\ sin\theta$, we have $x=-4cos(-\frac{\pi}{2})=0$ and $y=-4sin(-\frac{\pi}{2})=4$, giving a point $(0,4)$
