Question

eliminate the parameter and write the corresponding rectangular equation whose graph represents the curve. x=cos(theta) y=2sin^2(theta)

Answer 1

http://www.wolframalpha.com/input/?i=x%3D+cos%28t%29%2Cy%3D2+sin^2%28t%29

Answer 2

dcardona: You are asked to eliminate the parameter (which in this problem is the angle theta) and end up with a function in x and y with the same graph as the set of parametric equations has.

You could easily solve x=cos(theta) for theta. How would you express the result (theta)?

Substitute this formula for theta into that for y.