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.
graph (y=cos(x), y=-1/sqrt(2)) from x=-pi to 2pi
graph (y=cos(x), y=-1/sqrt(2)) from x=-pi to 2pi
Natural Language
Math Input
Extended Keyboard
