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.
(-2/3 arctan(sqrt((4+1)/(4-2)))) - (- 2/3 arctan(sqrt((3+1)/(3-2))))
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random