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.
(-e^(i (omega t + k r)) + e^(i (omega t - k r))) / (e^(i (omega t + k r)) + e^(i (omega t - k r)))
(-e^(i (omega t + k r)) + e^(i (omega t - k r))) / (e^(i (omega t + k r)) + e^(i (omega t - k r)))
Natural Language
Math Input
Extended Keyboard
