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/osnet-11/usr/src/cmd/perl/5.8.4/distrib/lib/Math/
H A DComplex.pm53 sinh cosh tanh
1087 # tanh
1089 # Computes the hyperbolic tangent tanh(z) = sinh(z) / cosh(z).
1091 sub tanh { subroutine
1094 _divbyzero "tanh($z)", "cosh($z)" if ($cz == 0);
1692 tanh(z) = sinh(z) / cosh(z) = (exp(z) - exp(-z)) / (exp(z) + exp(-z))
1696 coth(z) = 1 / tanh(z)
1881 tanh sech csch coth
1904 C<sec>, C<tanh>, the argument cannot be I<pi/2 + k * pi>, where I<k>

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