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(x)+sin(y)+sin(x+y)=12/5 and cos(x)+cos(y)-cos(x+y)=7/5
sin(x)+sin(y)+sin(x+y)=12/5 and cos(x)+cos(y)-cos(x+y)=7/5
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
