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CACOSH(P)		   POSIX Programmer's Manual		     CACOSH(P)

NAME
       cacosh, cacoshf, cacoshl - complex arc hyperbolic cosine functions

SYNOPSIS
       #include <complex.h>

       double complex cacosh(double complex z);
       float complex cacoshf(float complex z);
       long double complex cacoshl(long double complex z);

DESCRIPTION
       These  functions	 shall compute the complex arc hyperbolic cosine of z,
       with a branch cut at values less than 1 along the real axis.

RETURN VALUE
       These functions shall return the complex arc hyperbolic	cosine	value,
       in the range of a half-strip of non-negative values along the real axis
       and in the interval [-ipi, +ipi] along the imaginary axis.

ERRORS
       No errors are defined.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       ccosh() , the Base Definitions volume  of  IEEE Std 1003.1-2001,	 <com‐
       plex.h>

COPYRIGHT
       Portions	 of  this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
       --  Portable  Operating	System	Interface (POSIX), The Open Group Base
       Specifications Issue 6, Copyright (C) 2001-2003	by  the	 Institute  of
       Electrical  and	Electronics  Engineers, Inc and The Open Group. In the
       event of any discrepancy between this version and the original IEEE and
       The  Open Group Standard, the original IEEE and The Open Group Standard
       is the referee document. The original Standard can be  obtained	online
       at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group		     2003			     CACOSH(P)
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