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[Sqrt[1 - Power[x Cos[t], 2]] * 2 * x, {x, 0, 1}, {t, 0, Pi / 2}]
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random