cos(xpi/2)-((cosh(ln(y)cos(1)sqrt((pi^2/4)-(xpi/2)^2))-1)/(cosh(ln(y)cos(1)sqrt(pi^2/4))-1))

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.