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.
(pi/4)*cos(pi^2/16)*(3/sqrt(13))+(pi/4)*cos(pi^2/16)*(2/sqrt(13))
(pi/4)*cos(pi^2/16)*(3/sqrt(13))+(pi/4)*cos(pi^2/16)*(2/sqrt(13))
Natural Language
Math Input
Extended Keyboard
