acosh(), acoshf()

inverse hyperbolic cosine function 

Function


SYNOPSIS

#include <math.h>

double acosh(double x)

float acoshf(float x)


DESCRIPTION

The acosh() and acoshf() functions compute the inverse hyperbolic cosine of the real argument x.

The acoshf() function is a single-precision version of acosh().


PARAMETERS

x 

Value greater than 1.0.


RETURN VALUES

If x is less than one, acosh(x) and acoshf(x) return NaN and set the global variable errno to EDOM in POSIX mode. In SVID and XOPEN modes, the matherr() function is called.


CONFORMANCE

acosh(): UNIX 98

acoshf(): PTC MKS Toolkit UNIX APIs extension


MULTITHREAD SAFETY LEVEL

MT-Safe.


PORTING ISSUES

None.


AVAILABILITY

PTC MKS Toolkit for Professional Developers
PTC MKS Toolkit for Professional Developers 64-Bit Edition
PTC MKS Toolkit for Enterprise Developers
PTC MKS Toolkit for Enterprise Developers 64-Bit Edition


SEE ALSO

Functions:
asinh(), atanh(), exp(), math(), matherr()


PTC MKS Toolkit 10.3 Documentation Build 39.