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 sum ((4 Pi Sin[(n Pi)/4]^2)/(n Pi) * Sin(nx), n=1 to 100
plot sum ((4 Pi Sin[(n Pi)/4]^2)/(n Pi) * Sin(nx), n=1 to 100
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random