2 csch - hyperbolic cosecant
9 eps nonzero real, defaults to epsilon()
14 Calculate the csch of x to a multiple of epsilon, with error less in
15 absolute value than .75 * eps.
17 csch(x) = 2/(exp(x) - exp(-x))
20 ; print csch(1, 1e-5), csch(1, 1e-10), csch(1, 1e-15), csch(1, 1e-20)
21 .85092 .8509181282 .850918128239322 .85091812823932154513
27 NUMBER *qcsch(NUMBER *x, NUMBER *eps)
30 sinh, cosh, tanh, sech, 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: csch,v 30.1 2007/03/16 11:10:42 chongo Exp $
50 ## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/csch,v $
52 ## Under source code control: 1995/11/13 03:49:00
53 ## File existed as early as: 1995
55 ## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
56 ## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/