# Math Help - Parametric->Rectangular

1. ## Parametric->Rectangular

Find the equivalent rectangular equation:

$x=sec(t)$
$y=cos(t)$
$\frac{-\pi}{2}\le t \le\frac{\pi}{2}$

Also, do circle/elliptical parameters always remain between $0\le y \le 2\pi$??? It seems like they do but I feel I am not seeing the whole picture in gestalt.

2. ## Re: Parametric->Rectangular

Originally Posted by Greymalkin
Find the equivalent rectangular equation:
$x=sec(t)$
$y=cos(t)$
$\frac{-\pi}{2}\le t \le\frac{\pi}{2}$
Is it true that $xy=1~?$