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.
|-4+8cos^2(α)+8cos^2(β)+4cos^2(β-α)|=1
|-4+8cos^2(α)+8cos^2(β)+4cos^2(β-α)|=1
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random