Convert each of the following points from rectangular coordinates to polar coordinates.

Question

(-1, 1)
A) (sqrt(2), pi/4)
B) (sqrt(2), 3pi/4)
C) (-sqrt(2), pi/4)
D) (-sqrt(2), 3pi/4)
E) None of These

Answer 1

the angle is in QII, so (B)

Generally, the radius is expressed as a positive number, though (-sqrt(2),-pi/4) would also have been correct.