ACOSH(3m,L)                 AIX Technical Reference                 ACOSH(3m,L)



-------------------------------------------------------------------------------
acosh, asinh, atanh



PURPOSE

Inverse hyperbolic functions.

LIBRARY

Math Library (libm.a)

SYNTAX

#include <math.h>

double acosh (x)
double x;

double asinh (x)
double x;

double atanh (x)
double x;

DESCRIPTION

These subroutines acosh, asinh, atanh compute the designated inverse hyperbolic
functions for real arguments.

The acosh subroutine returns the value HUGE and sets error to ED8M if the
argument is less than 1.

The atanh subroutine returns the reserved operand if the argument has absolute
value bigger than or equal to 1.

RELATED INFORMATION

In this book:  "cbrt, exp, expm1, log, log10, log1p, pow, sqrt," and "math.h."















Processed November 7, 1990        ACOSH(3m,L)                                 1