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.
solve(1/4 (y (y + sqrt(4 + y^2)) + 4 sinh^(-1)(y/2))==x,y)
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random