calc question..

Question

What are one of the three pairs of polar coordinates for this point of (5, 210°) with –360° < Θ ≤ 360°?

a. (-5, -30°)

b. (–5, 30°)

c. (5, –30°)

Answer 1

 is positive the point will be in the same quadrant as . On the other hand if  is negative the point will end up in the quadrant exactly opposite 

210 - 180 = 30 degrees

b. (–5, 30°)