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.
sqrt3 * cos(pi/2 - x) = cos(-x), 0 <= x < 2pi
sqrt3 * cos(pi/2 - x) = cos(-x), 0 <= x < 2pi
Natural Language
Math Input
Extended Keyboard