casin man page on Oracle

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```CASIN(3P)		   POSIX Programmer's Manual		     CASIN(3P)

PROLOG
This  manual  page is part of the POSIX Programmer's Manual.  The Linux
implementation of this interface may differ (consult the	 corresponding
Linux  manual page for details of Linux behavior), or the interface may
not be implemented on Linux.

NAME
casin, casinf, casinl - complex arc sine functions

SYNOPSIS
#include <complex.h>

double complex casin(double complex z);
float complex casinf(float complex z);
long double complex casinl(long double complex z);

DESCRIPTION
These functions shall compute the complex arc sine of  z,  with	branch
cuts outside the interval [-1, +1] along the real axis.

RETURN VALUE
These  functions	 shall return the complex arc sine value, in the range
of a strip mathematically unbounded along the imaginary axis and in the
interval [-pi/2, +pi/2] along the real axis.

ERRORS
No errors are defined.

The following sections are informative.

EXAMPLES
None.

APPLICATION USAGE
None.

RATIONALE
None.

FUTURE DIRECTIONS
None.

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

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			     CASIN(3P)
```
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