# catanhf(3) [osx man page]

CATANH(3) BSD Library Functions Manual CATANH(3)NAME

catanhcomplex inverse hyperbolic tangent function--SYNOPSIS

double complex catanh(double complex z); long double complex catanhl(long double complex z); float complex catanhf(float complex z);DESCRIPTION

catanh(z) computes the inverse hyperbolic tangent of the complex floating-point number z, with branch cuts outside the interval [, 1] along the real axis. catanh() returns values in a strip of the complex plane with imaginary part in the interval [-Pi/2, Pi/2]. For all complex floating point numbers z, catanh(conj(z)) = conj(catanh(z)). catanh(-z) = -catanh(z)-1SPECIAL VALUES

The symmetries of catanh() are used to abbreviate the specification of special values. catanh(0 + 0i) returns 0 + 0 i. catanh(0 + NaN i) returns 0 + NaN i. catanh(1 + 0i) returns inf + 0i and raises the divide-by-zero flag. catanh(x + inf i) returns 0 + Pi/2 i, for finite positive-signed x. catanh(x + NaN i) returns NaN + NaN i, for non-zero finite x. catanh(inf + yi) returns 0 + Pi/2 i, for finite positive-signed y. catanh(inf + inf i) returns 0 + Pi/2 i. catanh(inf + NaN i) returns 0 + NaN i. catanh(NaN + yi) returns NaN + NaN i, for finite y. catanh(NaN + inf i) returns 0 + Pi/2 i. catanh(NaN + NaN i) returns NaN + NaN i.NOTES

SEE ALSO

ctanh(3) complex(3)STANDARDS

The catanh() function conforms to ISO/IEC 9899:2011.4th Berkeley DistributionDecember 11, 2006 4th Berkeley Distribution

## Check Out this Related Man Page

NAME

catanhcomplex inverse hyperbolic tangent function--SYNOPSIS

double complex catanh(double complex z); long double complex catanhl(long double complex z); float complex catanhf(float complex z);DESCRIPTION

catanh(z) computes the inverse hyperbolic tangent of the complex floating-point number z, with branch cuts outside the interval [, 1] along the real axis. catanh() returns values in a strip of the complex plane with imaginary part in the interval [-Pi/2, Pi/2]. For all complex floating point numbers z, catanh(conj(z)) = conj(catanh(z)). catanh(-z) = -catanh(z)-1SPECIAL VALUES

The symmetries of catanh() are used to abbreviate the specification of special values. catanh(0 + 0i) returns 0 + 0 i. catanh(0 + NaN i) returns 0 + NaN i. catanh(1 + 0i) returns inf + 0i and raises the divide-by-zero flag. catanh(x + inf i) returns 0 + Pi/2 i, for finite positive-signed x. catanh(x + NaN i) returns NaN + NaN i, for non-zero finite x. catanh(inf + yi) returns 0 + Pi/2 i, for finite positive-signed y. catanh(inf + inf i) returns 0 + Pi/2 i. catanh(inf + NaN i) returns 0 + NaN i. catanh(NaN + yi) returns NaN + NaN i, for finite y. catanh(NaN + inf i) returns 0 + Pi/2 i. catanh(NaN + NaN i) returns NaN + NaN i.NOTES

SEE ALSO

ctanh(3) complex(3)STANDARDS

The catanh() function conforms to ISO/IEC 9899:2011.4th Berkeley DistributionDecember 11, 2006 4th Berkeley Distribution