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.
Demuestra (1 - cos x)/x^2 -> 1/2 usando la identidad 1 - cos x = 2sin^2(x/2)
Demuestra (1 - cos x)/x^2 -> 1/2 usando la identidad 1 - cos x = 2sin^2(x/2)
Natural Language
Math Input
Extended Keyboard