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Math Help - from parametri to cartesian for ellipse pedal curve

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    Smile from parametric to cartesian for ellipse pedal curve

    Hello!For a pedal of the ellipse i found the parametric and the corresponding Cartesian equation (see annex).Who knows a algebric method not too complicated to go from the parametric to cartesian?To me at a certain point I must solve a quartic equations in cos(t)!. Help me, please!
    Attached Thumbnails Attached Thumbnails from parametri to cartesian for ellipse pedal curve-parametric-cartesian-equazion-ellipse-pedal-curve.jpg  
    Last edited by scifo; May 19th 2012 at 07:41 AM.
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