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.
sin(2x+y)sin(2y) - sin(x+2y) sin(2x) = 0
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random