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.
sum(sqrt((pi/100)^2 + 4 * sin(pi/200)^2 * cos((pi/100) * (k + 1/2))^2),k=1,k=100)
sum(sqrt((pi/100)^2 + 4 * sin(pi/200)^2 * cos((pi/100) * (k + 1/2))^2),k=1,k=100)
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random