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Math Help - From polar form to rectangular form..help!

  1. #1
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    From polar form to rectangular form..help!

    Here is the problem...

    Write the polar equation r = cos [theta] + sin [theta] in rectangular form.

    Help please!
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  2. #2
    Super Member malaygoel's Avatar
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    Quote Originally Posted by skippydurge
    Here is the problem...

    Write the polar equation r = cos [theta] + sin [theta] in rectangular form.

    Help please!
    the parameters in polar coordinates are r and theta
    the parameters in rectangular coordinates are x and y
    these are related be
    x= r cos(theta)
    y = r sin(theta)
    x^2 + y^2 =r^2
    your equation :r = cos [theta] + sin [theta]
    multiply whole equation by r
    r^2 = rcos [theta] + rsin [theta]
    x^2 + y^2 = x +y
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  3. #3
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    Thank you very much!
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