  The generalized trigonometric functions occur as an eigenfunction of the
Dirichlet problem for the one-dimensional $p-$Laplacian. The generalized
hyperbolic functions are defined similarly. Some classical inequalities for
trigonometric and hyperbolic functions, such as Mitrinovi\'c-Adamovi\'c
inequality, Lazarevi\'c's inequality, Huygens-type inequalities, Wilker-type
inequalities, and Cuza-Huygens-type inequalities, are generalized to the case
of generalized functions.
