2 cosh - hyperbolic cosine
9 eps nonzero real, defaults to epsilon()
14 Calculate the cosh of x to the nearest or next to nearest multiple of
15 epsilon, with absolute error less than .75 * abs(eps).
17 cosh(x) = (exp(x) + exp(-x))/2
20 ; print cosh(1, 1e-5), cosh(1, 1e-10), cosh(1, 1e-15), cosh(1, 1e-20)
21 1.54308 1.5430806348 1.543080634815244 1.54308063481524377848
27 NUMBER *qcosh(NUMBER *x, NUMBER *eps)
30 sinh, tanh, sech, csch, coth, epsilon
32 ## Copyright (C) 1999 Landon Curt Noll
34 ## Calc is open software; you can redistribute it and/or modify it under
35 ## the terms of the version 2.1 of the GNU Lesser General Public License
36 ## as published by the Free Software Foundation.
38 ## Calc is distributed in the hope that it will be useful, but WITHOUT
39 ## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
40 ## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
41 ## Public License for more details.
43 ## A copy of version 2.1 of the GNU Lesser General Public License is
44 ## distributed with calc under the filename COPYING-LGPL. You should have
45 ## received a copy with calc; if not, write to Free Software Foundation, Inc.
46 ## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
48 ## @(#) $Revision: 30.1 $
49 ## @(#) $Id: cosh,v 30.1 2007/03/16 11:10:42 chongo Exp $
50 ## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/cosh,v $
52 ## Under source code control: 1994/03/19 01:40:28
53 ## File existed as early as: 1994
55 ## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
56 ## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/