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Command: acoshf | Section: 3 | Source: MINIX | File: acoshf.3
ACOSH(3) FreeBSD Library Functions Manual ACOSH(3)
NAME
acosh, acoshf, acoshl - inverse hyperbolic cosine function
LIBRARY
Math Library (libm, -lm)
SYNOPSIS
#include <math.h>
double
acosh(double x);
float
acoshf(float x);
long double
acoshl(long double x);
DESCRIPTION
The acosh(), acoshf(), and acoshl() functions compute the inverse
hyperbolic cosine of the real argument x.
RETURN VALUES
If x is less than one, acosh(x), acoshf(x), and acoshl(x) return NaN and
set the global variable errno to EDOM.
SEE ALSO
asinh(3), atanh(3), exp(3), math(3)
STANDARDS
The acosh() function conforms to ISO/IEC 9899:1999 ("ISO C99").
HISTORY
The acosh() function appeared in 4.3BSD.
FreeBSD 14.1-RELEASE-p8 January 29, 2013 FreeBSD 14.1-RELEASE-p8