Function librapid::atanh(const mpfr&)# Defined in File multiprecTrig.cpp Function Documentation# mpfr librapid::atanh(const mpfr &val)# Hyperbolic arctangent of a multiprecision floating point value: \( \tanh^{-1} (x) \) Parameters val – The value to take the hyperbolic arctangent of Returns The hyperbolic arctangent of the value