ASINH(3M) 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.
ERROR (due to Roundoff etc.)
These functions inherit much of their error from log1p described in exp(3M). On a VAX, acosh is accurate to about 3 ulps, asinh and atanh
to about 2 ulps. An ulp is one Unit in the Last Place carried.
DIAGNOSTICS
Acosh returns the reserved operand on a VAX if the argument is less than 1.
Atanh returns the reserved operand on a VAX if the argument has absolute value bigger than or equal to 1.
SEE ALSO
math(3M), exp(3M), infnan(3M)
AUTHOR
W. Kahan, Kwok-Choi Ng
4.3 Berkeley Distribution May 12, 1986 ASINH(3M)
