acosh(), acoshf() inverse hyperbolic cosine function	Function
	SYNOPSIS DESCRIPTION PARAMETERS RETURN VALUES CONFORMANCE MULTITHREAD SAFETY LEVEL PORTING ISSUES AVAILABILITY SEE ALSO

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SYNOPSIS

#include <math.h>

double acosh(double x)

float acoshf(float x)

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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().

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PARAMETERS

x 

Value greater than 1.0.

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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.

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CONFORMANCE

acosh(): UNIX 98

acoshf(): MKS Toolkit UNIX APIs extension

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MULTITHREAD SAFETY LEVEL

MT-Safe.

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PORTING ISSUES

None.

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AVAILABILITY

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

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SEE ALSO

Functions:

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

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MKS Toolkit 9.2 Documentation Build 16.