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    A curve has parametric equations x = sint y = cos2t, 0<t<2pie

    find the cartesian equation of the curve

    can someone please tell me where to go with this?

    i have x = sint y = 2costsint y = 2costx

    what do i do now?

    thanks
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    cos2t = 2cos2t - 1 = 1 - 2sin2t = cos2t - sin2t

    so y = 1-2x2

    (sin2x = 2sinxcosx)
 
 
 
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Updated: February 2, 2006

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