# Math Help - Polar Coordinates

1. ## Polar Coordinates

(-5,12) are the rectangular coordinates of a point. Find two pairs of polar coordinates (r,A) for each point, on with r>0 and one with r<0. Express A in radians. Please help!

2. ## Re: Polar Coordinates

Originally Posted by Britwells
(-5,12) are the rectangular coordinates of a point. Find two pairs of polar coordinates (r,A) for each point, on with r>0 and one with r<0. Express A in radians. Please help!

Well in my universe, $(-5,12)\in\text{Quad}II$ thus $r=13~\&~A=\pi+\arctan \left( {\frac{{ - 12}}{5}} \right)$.

You have to deal with the other nonsense.