# Parametric to Cartesian equationWatch

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#1
Can someone please show me how to change the parametric equations:

x = 3√3cos t/(2 - cos t) and y = 6sin t/(2-cos t)

into a cartesian equation.

Thanks.
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14 years ago
#2
(Original post by the_anomaly)
Can someone please show me how to change the parametric equations:

x = 3√3cos t/(2 - cos t) and y = 6sin t/(2-cos t)

into a cartesian equation.

Thanks.
If you divide the second by the first you can get tant in terms of x and y.

Then sub back into the first equation remembering

cos t = 1/rt(1+tan^2t)
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