File TRGSMP > contains a simplifier which employs the identities
sin(x)^2 + cos(x)^2 = 1  and cosh(x)^2 - sinh(x)^2 = 1 in a manner
different from any of the built-in trigonometric simplifiers.  Usage
is of the form

        TRIGSIMP(expression).

Code added 7/5/80 by ELL to convert other trig and hyper trig functions
to sin and cos. The result will still be in terms of sin,cos,sinh and
cosh. Further reduction can sometimes be effected by using TRIGREDUCE
on the value returned by TRIGSIMP.

Send questions and comments to David R. Stoutemyer, Electrical
Engineering Department, University of Hawaii, Honolulu, Hawaii 96822
(login name: STOUTE).