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.
sqrt(58 - sqrt(2))=2 (5 sin(π/8) + 2 cos(π/8))
sqrt(58 - sqrt(2))=2 (5 sin(π/8) + 2 cos(π/8))
Natural Language
Math Input
Extended Keyboard