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.
parametric plot (4 cos(phi) %2B 2 cos(2phi)%2C 4 sin(phi) - 2 sin(2phi))
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random