California State University
Cal State, San Bernadino: Hyperbolas
An excellent site describing the equations for hyperbolas, including graphs of hyperbolic functions and multiple exercises for practice.
University of Georgia
University of Georgia: Hyperbolas
A four-lesson tutorial on hyperbolas, the standard form for hyperbolic functions, and how to graph them. Includes a lesson quiz.
Wolfram Research
Wolfram Math World: Generalized Hyperbolic Functions
This site from MathWorld.com has information on the Hyperbolic functions. This site includes a definition which includes the derivative of such a function, the Euler formula for the function, its Laplace transform, and a list of the...
University College London
University College London: Introduction to Hyperbolic Functions
This is a brief introduction to hyperbolic functions. Contains a definition only, no graphics.