# Math Help - Eliminating the parameter in parametric equations?

1. ## Eliminating the parameter in parametric equations?

Can someone please explain this to me?

Eliminate the parameter for the equations x=secA, y=tanA

Thanks for any help!

2. Originally Posted by repete
Can someone please explain this to me?

Eliminate the parameter for the equations x=secA, y=tanA

Thanks for any help!
Here you can use the identity

$tan^2x + 1 = sec^2x$

so...
$y^2 + 1 = x^2$

Good luck!

3. ## Thanks

Thanks for the help, as I thought it was very simple!

4. Originally Posted by repete
Thanks for the help, as I thought it was very simple!