casin(3) [redhat man page]

```CASIN(3)						     Linux Programmer's Manual							  CASIN(3)

NAME
casin, casinf, casinl - complex arc sine

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  calculate  the  complex  arc sine of z.  If y = casin(z), then z = csin(y).  The real part of y is chosen in the interval
[-pi/2,pi/2].

One has:

casin(z) = -i clog(iz + csqrt(1 - z * z))

VERSIONS
These functions first appeared in glibc in version 2.1.

ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).

+-----------------------------+---------------+---------+
|Interface		     | Attribute     | Value   |
+-----------------------------+---------------+---------+
|casin(), casinf(), casinl()  | Thread safety | MT-Safe |
+-----------------------------+---------------+---------+
CONFORMING TO
C99, POSIX.1-2001, POSIX.1-2008.

clog(3), csin(3), complex(7)

COLOPHON
This page is part of release 4.15 of the Linux man-pages project.  A description of the project, information about reporting bugs, and  the

2015-04-19								  CASIN(3)```

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```CASIN(3)						     Linux Programmer's Manual							  CASIN(3)

NAME
casin, casinf, casinl - complex arc sine

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  calculate  the  complex  arc sine of z.  If y = casin(z), then z = csin(y).  The real part of y is chosen in the interval
[-pi/2,pi/2].

One has:

casin(z) = -i clog(iz + csqrt(1 - z * z))

VERSIONS
These functions first appeared in glibc in version 2.1.

ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).

+-----------------------------+---------------+---------+
|Interface		     | Attribute     | Value   |
+-----------------------------+---------------+---------+
|casin(), casinf(), casinl()  | Thread safety | MT-Safe |
+-----------------------------+---------------+---------+
CONFORMING TO
C99, POSIX.1-2001, POSIX.1-2008.

clog(3), csin(3), complex(7)

COLOPHON
This page is part of release 4.15 of the Linux man-pages project.  A description of the project, information about reporting bugs, and  the