The parametric equations of a curve are: x = cos2θ y = sinθcosθ. Find the cartesian form of the equation.

x = cos2θ  y = sinθcosθcos2θ = cos² θ  - sin²θ cos² θ  + sin²θ  = 12cos² θ  = 1 + cos2θ cos² θ  = 1/2(1 + x)2sin²θ  = 1 - cos2θ sin²θ  = 1/2 (1 - x)y²= sin²θcos² θy²=  ( 1/2(1 + x)) . (1/2 (1 - x))4y² = 1 - x² x² + 4y² = 1