Answer
$(2,0)$
Work Step by Step
By definition: $x=r\cdot \cos(\theta)$ and $y=r\cdot \sin(\theta)$.
Here, we have $r=-2 \text{ and } \theta=-180^\circ$.
Hence, after plugging these in:
$x=-2\cdot \cos(-180^\circ)=-2\cdot(-1)=2$
$y=-2\cdot \sin(-180^\circ)=-2\cdot0=0$
The point has coordinates $(2,0)$ in the rectangular coordinate system.