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 x=-pi/6, x=pi/6, y=cos(x), y=sqrt(3)/2
plot x=-pi/6, x=pi/6, y=cos(x), y=sqrt(3)/2
Natural Language
Math Input
Extended Keyboard