Convert the rectangular coordinates into polar coordinates (-5,-5sqrt3)

Answer 1

r^2 = (-5)^2 + (-5√3)^2
= 25 + 75 = 100
r = 10
tanØ = -5√3/-5 = √3
Ø = 60°

so what do you think?

Answer 2

Point C has rectangular coordinates (-12,5). Convert this to polar coordinates