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

NAME
       casin, casinf - complex arc sine functions

SYNOPSIS
       #include <complex.h>

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

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

RETURN VALUE
       These functions 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.

SEE ALSO
       csin(), 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			     CASIN(3P)
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