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Math Help - Cartesian coordinates (Conversion)

  1. #1
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    Cartesian coordinates (Conversion)

    I have to lean how to convert the following equation to Cartesian coordinates:
    r sin q = -2

    Is there a formula I can use to do this? I am having a hard time finding information on google on how to do it.


    Thanks for any help

    PS- I am not sure what topic this falls under. :-/
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  2. #2
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    converting polar equation to rectangular coordinates

    I am a bit rusty on this but I think I know how to do it:

    Try to find rcos(theta) or rsin(theta) in the equation and replace it with x or y and replace r2 with x2+y2. Often you will have to multiply both sides by something so that you can find these expressions.

    In this case r sin q = -2

    r sin(q) = -2

    y = -2

    Am I right anyone?
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  3. #3
    zee
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    these are the formulas:
    x=rcos(theta)
    y=rsin(theta)
    r^2 = x^2 + y^2
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  4. #4
    hpe
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    Quote Originally Posted by Math Help
    y = -2

    Am I right anyone?
    Yes, this is OK
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