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Math Help - Polar Coordinates

  1. #1
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    Smile Polar Coordinates

    The letters x and y represent the rectangular coordinates. Write each equation using polar coordinates (r, theta).

    (1) x^2 + y^2 = x

    (2) y^2 = 2x
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  2. #2
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    Quote Originally Posted by magentarita View Post
    The letters x and y represent the rectangular coordinates. Write each equation using polar coordinates (r, theta).

    (1) x^2 + y^2 = x

    (2) y^2 = 2x
    r^2=x^2+y^2
    x=r\cos\theta
    y=r\sin\theta

    (1)

    r^2=r\cos\theta
    r^2-r\cos\theta=0

    (2)

    (r \sin \theta)^2=2(r \cos \theta)

    r^2 \sin^2 \theta=2r \cos \theta

    r^2 \sin^2 \theta-2r \cos \theta=0
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  3. #3
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    I love it!

    Quote Originally Posted by masters View Post
    r^2=x^2+y^2
    x=r\cos\theta
    y=r\sin\theta

    (1)

    r^2=r\cos\theta
    r^2-r\cos\theta=0

    (2)

    (r \sin \theta)^2=2(r \cos \theta)

    r^2 \sin^2 \theta=2r \cos \theta

    r^2 \sin^2 \theta-2r \cos \theta=0
    I love and look forward to your replies. Thank you for helping me.
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  4. #4
    A riddle wrapped in an enigma
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    Quote Originally Posted by magentarita View Post
    I love and look forward to your replies. Thank you for helping me.
    Thank you for saying that. It feels good to be appreciated.
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  5. #5
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    ok

    Quote Originally Posted by masters View Post
    Thank you for saying that. It feels good to be appreciated.
    You're welcome!
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