## Copyright (C) 1994-2020 The Octave Project Developers
##
## See the file COPYRIGHT.md in the top-level directory of this distribution
## or <https://octave.org/COPYRIGHT.html/>.
##
##
## This file is part of Octave.
##
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## under the terms of the GNU General Public License as published by
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## -*- texinfo -*-
## @deftypefn {} {} acsc (@var{x})
## Compute the inverse cosecant in radians for each element of @var{x}.
## @seealso{csc, acscd}
## @end deftypefn

function y = acsc (x)

  if (nargin != 1)
    print_usage ();
  endif

  y = asin (1 ./ x);

endfunction


%!test
%! rt2 = sqrt (2);
%! rt3 = sqrt (3);
%! v = [pi/6, pi/4, pi/3, pi/2, pi/3, pi/4, pi/6];
%! x = [2, rt2, 2*rt3/3, 1, 2*rt3/3, rt2, 2];
%! assert (acsc (x), v, sqrt (eps));

%!error acsc ()
%!error acsc (1, 2)