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.
integrate 2/pi^2 * 1/sqrt((r^2-x^2)(R^2-(R-r)^2)) for r from 0 to R
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random