Greetings all. I was solicited by a friend to find the inverse of a particular function, and I can't for the life of me determine/remember how. The original equation is y = 3+x^2+tan((1/2)*Pi*x) with x on (-1,1). The function is invertible - f' is always > 0 on that interval - but I have had no success attempting to determine precisely what the inverse is. Thanks for any help you can give.