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.
solve sin((7/3)*pi)*sin(-pi/3)+cos((4/3)*pi)*cos(-pi/3)
solve sin((7/3)*pi)*sin(-pi/3)+cos((4/3)*pi)*cos(-pi/3)
Natural Language
Math Input
Extended Keyboard
