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.
(4/pi)*Sum[Cos[(2k+1)*x]/(2k+1)^2,{k,0,10}] - Sum[Sin[2*k*x]/k,{k,1,10}]
(4/pi)*Sum[Cos[(2k+1)*x]/(2k+1)^2,{k,0,10}] - Sum[Sin[2*k*x]/k,{k,1,10}]
Natural Language
Math Input
Extended Keyboard
