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.
∫ √((-t sin(t))^2 + (t cos(t))^2) from -π to (π/2)
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random