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((2m-1)*x)/(2m-1), m=1 to 50, x=-5 to 5
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random