ASINH(3M) —

NAME

asinh, acosh, atanh − inverse hyperbolic functions

SYNOPSIS

#include <math.h>

double asinh(x)
double x;

double acosh(x)
double x;

double atanh(x)
double x;

DESCRIPTION

These functions compute the designated inverse hyperbolic functions for real arguments.

ERRORS (due to roundoff, etc)

These functions inherit much of their error from loglp() described in exp(3M).

DIAGNOSTICS

Acosh returns a NaN if the argument is less than 1. Atanh returns a NaN if the argument has absolute value bigger than 1, and returns sign(x)∗ ∞ if it has an absolute value equal to 1.

Museum