Whitman College: David Guichard's "Calculus, Chapter 4: Transcendental Functions, Section 4.11: Hyperbolic Functions"

Read Section 4.11 (pages 99-102). In this reading, you are introduced to the hyperbolic trigonometric functions. These functions, which appear in many engineering and physics applications, are specific combinations of exponential functions which have properties similar to those that the ordinary trigonometric functions have.