std::tanh(std::complex)

< cpp‎ | numeric‎ | complex

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std::complex
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 Defined in header template< class T > complex tanh( const complex& z ); (since C++11)

Computes complex hyperbolic tangent of a complex value z.

Contents

Parameters

 z - complex value

Return value

If no errors occur, complex hyperbolic tangent of z is returned

Error handling and special values

Errors are reported consistent with math_errhandling

If the implementation supports IEEE floating-point arithmetic,

• std::tanh(std::conj(z)) == std::conj(std::tanh(z))
• std::tanh(-z) == -std::tanh(z)
• If z is (+0,+0), the result is (+0,+0)
• If z is (x,+∞) (for any finite x), the result is (NaN,NaN) and FE_INVALID is raised
• If z is (x,NaN) (for any finite x), the result is (NaN,NaN) and FE_INVALID may be raised
• If z is (+∞,y) (for any finite positive y), the result is (1,+0)
• If z is (+∞,+∞), the result is (1,±0) (the sign of the imaginary part is unspecified)
• If z is (+∞,NaN), the result is (1,±0) (the sign of the imaginary part is unspecified)
• If z is (NaN,+0), the result is (NaN,+0)
• If z is (NaN,y) (for any non-zero y), the result is (NaN,NaN) and FE_INVALID may be raised
• If z is (NaN,NaN), the result is (NaN,NaN)