“An Introduction to Hyperbolic Functions in Elementary Calculus”
Jerome Rosenthal, Broward Community College, Pompano Beach, FL
33063
Mathematics Teacher,
April 1986, Volume 79, Number 4, pp. 298–300.
Mathematics Teacher
is a publication of the National Council of Teachers of
Mathematics (NCTM).
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Article reprint with permission from
Mathematics Teacher,
copyright April 1986 by the
National Council of Teachers of Mathematics. All rights reserved.
T
he customary introduction to hyperbolic functions mentions that the combinations
and
occur with sufficient frequency to warrant special names. These functions are analogous,
respectively, to
and
This article attempts to give a geometric justification for
cosh and sinh, comparable to the functions of sin and cos as applied to the unit circle.
This article describes a means of identifying
and
with the coordinates of a point
on a comparable “unit hyperbola,”
The functions cosh
u
and sinh
u
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 Winter '08
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 Calculus, Hyperbolic Functions, NCTM, Hyperbolic function, OAP OPC PCBA ABO

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