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.
(a^2-b^2)^2+(2b(a-b cosθ))^2-2(a^2-b^2)(2b(a-b cosθ))cosθ=(a^2+b^2-2a b cosθ)^2
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random