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.
integral((-0.25*cos(2/3*pi*t)+0.25)*e^-(i*n*2/5*pi*t))dt
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random