## Copyright (C) 2006 David Bateman
##
## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 2 of the License, or
## (at your option) any later version.
##
## This program 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 General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program; if not, write to the Free Software
## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
## -*- texinfo -*-
## @deftypefn {Function File} {} secd (@var{x})
## Compute the secant of an angle in degrees.
## @seealso{sec, cscd, sind, cosd}
## @end deftypefn
function y = secd (x)
if (nargin != 1)
print_usage ();
endif
y = 1 ./ cosd (x);
endfunction
//%!error(secd())
//%!error(secd(1,2))
//%!assert(secd(0:10:80),sec(pi*[0:10:80]/180),-10*eps)
//%!assert(secd([0,180,360]) != Inf)
//%!assert(secd([90,270]) == Inf)
/*
@GROUP
trigonometric
@SYNTAX
angle = secd(value)
@DOC
Compute the secant of an angle in degrees.
@EXAMPLES
@NOTES
@SEE
cos, acosh, sin, asin, asinh
*/