plot 180/pi*(sinh(x)*(2 - (1 - x^6)^(1/6)) - asin(x)), x=-sqrt(2)/2..sqrt(2)/2

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.