Guardian Native C Library Calls Reference Manual (G06.29+, H06.08+, J06.03+)

cacosh(3) Guardian Native C Library Calls Reference Manual
NAME
cacosh - Computes the complex arc hyperbolic cosine
LIBRARY
H-series and J-series native Guardian processes: $SYSTEM.ZDLLnnn.ZCREDLL
32-bit H-series and J-series OSS processes: /G/system/zdllnnn/zcredll
64-bit H-series and J-series OSS processes: /G/system/zdllnnn/ycredll
SYNOPSIS
#include <complex.h>
double complex cacosh(
double complex z);
PARAMETERS
z Specifies a double complex value.
DESCRIPTION
The cacosh() function computes the complex arc hyperbolic cosine of z, in the range of a half-
strip of non-negative values along the real axis and in the interval [-iπ,+iπ] along the imaginary
axis.
There is a branch cut at values less than 1 along the real axis.
NOTES
This function is implemented only for the IEEE_float floating-point option. Applications using
this function cannot be compiled if the specified floating-point option is Tandem_float.
RETURN VALUES
The cacosh() function returns the complex arc hyperbolic cosine of z, in the range of a half-strip
of non-negative values along the real axis and in the interval [-iπ,+iπ] along the imaginary axis.
ERRORS
No errors are defined.
RELATED INFORMATION
Functions: acosh(3), cacoshf(3), cacoshl(3), ccosh(3).
STANDARDS CONFORMANCE
This function conforms to the ISO/IEC 9899:1999 standard.
This function conforms to the IEEE Std 1003.1, 2004 Edition.
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