Trigonometry (11th Edition) Clone

The rectangular coordinates are $(0,-4)$
We can find the x-coordinate: $x = r~cos~\theta$ $x = (-4)~cos~90^{\circ}$ $x = (-4)~(0)$ $x = 0$ We can find the y-coordinate: $y = r~sin~\theta$ $y = (-4)~sin~90^{\circ}$ $y = (-4)~(1)$ $y = -4$ The rectangular coordinates are $(0,-4)$