Question

Which set of polar coordinates describes the same location as the rectangular coordinates (4,-4)

Answer 1

r=4
theta=pi/2

x= r cos(theta) = 4 cos(pi/2) = 4(0) = 0
y = r sin(theta) = 4 sin(pi/2) = 4(1) = 4

(0,4) is the answer.

Answer 2

(4 sqrt2, 315 degrees)

Explanation:

apex