Express Parameter as x & y: Eliminate 2t

[meson0731]

Homework Statement

Eliminate the parameter and express in x and y

x= 2-3cos2t y= 5+7sin2t

Homework Equations

The Attempt at a Solution

I tried changing them in terms of cos^2t and sin^2t. I change the first equation into ((x-5)/6) = cos^2t. But I can't figure out how to change the second one in terms of sin^2t.

 

[LCKurtz]

Use $\cos^2(2t)+\sin^2(2t)=1$.

 

[meson0731]

Ahh thanks didn't know you could do that