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Math Help - Polar Coordinates

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    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!
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    Re: Polar Coordinates

    Quote Originally Posted by Britwells View Post
    (-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.
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