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.
lim (x → 0) [ √(1 + sinx) - √(1 - sinx) ] / x =
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random