Chapter 6.6, Problem 11E

In Exercises 9-16, plot the point having the given polar coordinates. Then find different polar coordinates ( r, $\theta$ ) for the same point for which $r<0$ and $0º\le \theta <\text{ 36}0º$ ; $r<0$ and $-360º\text{}<0<0º$ ; $r>0$ and $-360º\text{}<\theta <0º$.

(3, 90°)