Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

$(3.1, 0.11)$
The point $(x,y)$ in the rectangular coordinate system can be expressed as: $x=r \ \cos(\theta)$, $y=r \ \sin(\theta) ...(1)$ Here, we have $r=-3.1$ and $\theta= 182^{\circ}$ Plug these values in equation (1) to obtain: $x=(-3.1) \cos(182^{\circ}) \approx 3.1 \\ y=(-3.1) \sin(182^{\circ}) \approx 0.11$ Therefore, the point $(x,y)$ has coordinates $(3.1, 0.11)$ in the rectangular coordinate system.