Question

What is the Cartesian form of `( -9, (-7pi)/2 )`?

Answer 1

(0, `-9`)

Explanation:

Turn clockwise for negative angles, from `theta` = 0.
Here, r =`-9` and `theta=-7pi/2`.
Given point is same as `(-9, pi/2)`. .
x = `-9 cos (pi/2)` =0 and y = `-9 sin(pi/2)=-9`