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.
plot cos (x+y/2) + cos (y) + cos (c x + s y + (c y - s x)/2) + cos (c y - s x) + cos (c x - s y + (c y + s x)/2) + cos (c y + s x) where c= -1/2, s = sqrt(3)/2
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random