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Math Help - Parametric Equation

  1. #1
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    Parametric Equation

    Question :- Find the radius of parametric equation of the circle for the given x = 5 sin t and y = 5 cos t where 0 < t < pi ?
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  2. #2
    MHF Contributor MarkFL's Avatar
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    Re: Parametric Equation

    Square and add the parametric equations, apply a Pythagorean identity to eliminate the parameter, and you will have a Cartesian equation from which you should immediately recognize the radius.
    Thanks from topsquark and HallsofIvy
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