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ASIN
Section: Linux Programmer's Manual (3)
Updated: 20150419
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NAME
asin, asinf, asinl  arc sine function
SYNOPSIS
#include <math.h>
double asin(double x);
float asinf(float x);
long double asinl(long double x);
Link with lm.
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
asinf(),
asinl():

_BSD_SOURCE  _SVID_SOURCE  _XOPEN_SOURCE >= 600  _ISOC99_SOURCE 
_POSIX_C_SOURCE >= 200112L;
or
cc std=c99
DESCRIPTION
These functions calculate the principal value of the arc sine of
x;
that is the value whose sine is
x.
RETURN VALUE
On success, these functions return the principal value of the arc sine of
x
in radians; the return value is in the range [pi/2, pi/2].
If
x
is a NaN, a NaN is returned.
If
x
is +0 (0),
+0 (0) is returned.
If
x
is outside the range [1, 1],
a domain error occurs,
and a NaN is returned.
ERRORS
See
math_error(7)
for information on how to determine whether an error has occurred
when calling these functions.
The following errors can occur:
 Domain error: x is outside the range [1, 1]

errno
is set to
EDOM.
An invalid floatingpoint exception
(FE_INVALID)
is raised.
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).
Interface  Attribute  Value

asin(),
asinf(),
asinl()
 Thread safety  MTSafe

CONFORMING TO
C99, POSIX.12001, POSIX.12008.
The variant returning
double
also conforms to
SVr4, 4.3BSD, C89.
SEE ALSO
acos(3),
atan(3),
atan2(3),
casin(3),
cos(3),
sin(3),
tan(3)
COLOPHON
This page is part of release 4.04 of the Linux
manpages
project.
A description of the project,
information about reporting bugs,
and the latest version of this page,
can be found at
http://www.kernel.org/doc/manpages/.
Index
 NAME

 SYNOPSIS

 DESCRIPTION

 RETURN VALUE

 ERRORS

 ATTRIBUTES

 CONFORMING TO

 SEE ALSO

 COLOPHON

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