Question

What is the Cartesian form of `(- 1,(15pi )/3)`?

Answer 1

(x, y) = (1, 0)

Explanation:

Polar form `(r, theta) = (-1, 5pi)`.

cos (odd multiple of `pi)=-1`.

sin (any integer multiple of `pi)=0`

Cartesian form `(x, y)=(r cos theta, r sin theta)=(-cos 5pi, -sin 5pi)= (-(-1), 0)=(1, 0)`..