Answer
$(-2,0)$
Work Step by Step
By definition: $x=r\cdot \cos(\theta)$ and $y=r\cdot \sin(\theta)$.
Here $r=-2 \text{ and } \theta=0$.
Hence, after plugging these in:
$x=-2\cdot \cos(0)=-2\cdot1=-2$
$y=-2\cdot \sin(0)=-2\cdot0=0$
The point has coordinates $(-2,0)$ in the rectangular coordinate system.