mirror of
https://github.com/lcn2/calc.git
synced 2025-08-16 01:03:29 +03:00
57 lines
1.7 KiB
Plaintext
57 lines
1.7 KiB
Plaintext
NAME
|
|
asec - inverse trigonometric secant
|
|
|
|
SYNOPSIS
|
|
asec(x [,eps])
|
|
|
|
TYPES
|
|
x real, with absolute value >= 1
|
|
eps nonzero real, defaults to epsilon()
|
|
|
|
return real
|
|
|
|
DESCRIPTION
|
|
Returns the asec of x to a multiple of eps with error less in
|
|
absolute value than .75 * eps.
|
|
|
|
v = asec(x) is the number in [0, pi] for which sec(v) = x.
|
|
|
|
EXAMPLE
|
|
> print asec(2, 1e-5), asec(2, 1e-10), asec(2, 1e-15), asec(2, 1e-20)
|
|
1.0472 1.0471975512 1.047197551196598 1.04719755119659774615
|
|
|
|
LIMITS
|
|
none
|
|
|
|
LINK LIBRARY
|
|
NUMBER *qasec(NUMBER *x, NUMBER *eps)
|
|
|
|
SEE ALSO
|
|
asin, acos, atan, acsc, acot, epsilon
|
|
|
|
## Copyright (C) 1999 Landon Curt Noll
|
|
##
|
|
## Calc is open software; you can redistribute it and/or modify it under
|
|
## the terms of the version 2.1 of the GNU Lesser General Public License
|
|
## as published by the Free Software Foundation.
|
|
##
|
|
## Calc is distributed in the hope that it will be useful, but WITHOUT
|
|
## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
|
## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
|
|
## Public License for more details.
|
|
##
|
|
## A copy of version 2.1 of the GNU Lesser General Public License is
|
|
## distributed with calc under the filename COPYING-LGPL. You should have
|
|
## received a copy with calc; if not, write to Free Software Foundation, Inc.
|
|
## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
|
|
##
|
|
## @(#) $Revision: 29.2 $
|
|
## @(#) $Id: asec,v 29.2 2000/06/07 14:02:33 chongo Exp $
|
|
## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/asec,v $
|
|
##
|
|
## Under source code control: 1995/11/13 03:49:00
|
|
## File existed as early as: 1995
|
|
##
|
|
## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
|
|
## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
|