# Graphing an ellipse on TI-nspire CX CAS

How do I graph an ellipse on a TI-nspire CX CAS?

I know how to graph an ellipse with the equation $$\frac{(x-h)^2}{a^2} + \frac{(y-k)^2}{b^2 }=1$$

but I don't know how to put coefficients in the equation on the calculator. For example, how do I graph the ellipse with equation $$x^2 + 2y^2 = 1$$

-
is this on-topic? Shouldn't this be on the particular calculators manual or something? –  Sabyasachi Mar 12 at 20:30
You could just graph $y = \pm\sqrt{(1 - x^2)/2}$ seperately –  Nameless Mar 12 at 20:45
@Sabyasachi No, I've looked in the manual and online and found nothing. –  allie Mar 14 at 20:31

Go the graph screen, then press the menu button. Press 2:Equation, then 6:Conic.

It will allow you to enter the coefficients of the terms.

-

Go the graph screen, then press the menu button. Press 2:Equation, then 4:Ellipse.

Edit: Set the denominators to 1, and h and k to 0.

-
Right, I know how to do that. But how do I put the coefficient in front of the $y$? –  allie Mar 14 at 20:32
I don't think you can do that directly, but you can set b to $\sqrt{\frac{1}{2}}$ –  russCam Mar 14 at 22:10