Find the polar coordinates for point P which has Cartesian coordinates

Question

(1,-√3)
a) (1,5pi/6)
b) (1,5pi/3)
c) (√3,5pi/3)
d) (2,5pi/3)

Answer 1

x^2 + y^2 = r^2

Answer 2

tanθ = y/x
make sure you get the proper quadrant by checking the signs of x and y.

Answer 3

answer A?

Answer 4

(1,5pi/6)???

Answer 5

i refer you, again, to ... x^2 + y^2 = r^2

1^2 + (-√3)^2 = 1 + 3 = 4 = r^2

only one answer fits