Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
ParametricPlot3D[{r Cos[t], r Sin[t], r^2}, {r, 0, 2}, {t, -Pi/2, Pi/2}]
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
