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## -*- texinfo -*-
## @deftypefn {} {@var{y} =} cotd (@var{x})
## Compute the cotangent for each element of @var{x} in degrees.
## @seealso{acotd, cot}
## @end deftypefn

function y = cotd (x)

  if (nargin < 1)
    print_usage ();
  endif

  y = 1 ./ tand (x);

endfunction


%!assert (cotd (10:10:80), cot (pi*[10:10:80]/180), -10*eps)
%!assert (cotd ([0, 180, 360]) == Inf)
%!assert (cotd ([90, 270]) == 0)

%!error <Invalid call> cotd ()
