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25
26## -*- texinfo -*-
27## @deftypefn {} {} cot (@var{x})
28## Compute the cotangent for each element of @var{x} in radians.
29## @seealso{acot, cotd, coth}
30## @end deftypefn
31
32function y = cot (x)
33
34  if (nargin != 1)
35    print_usage ();
36  endif
37
38  y = 1 ./ tan (x);
39
40endfunction
41
42
43%!test
44%! rt2 = sqrt (2);
45%! rt3 = sqrt (3);
46%! x = [pi/6, pi/4, pi/3, pi/2, 2*pi/3, 3*pi/4, 5*pi/6];
47%! v = [rt3, 1, rt3/3, 0, -rt3/3, -1, -rt3];
48%! assert (cot (x), v, sqrt (eps));
49
50%!error cot ()
51%!error cot (1, 2)
52