man*/: ffix (un-bracket tables)

[thirdparty/man-pages.git] / man3 / asin.3

'\" t
.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
.\" and Copyright 2008, Linux Foundation, written by Michael Kerrisk
.\"     <mtk.manpages@gmail.com>
.\"
.\" SPDX-License-Identifier: Linux-man-pages-copyleft
.\"
.\" References consulted:
.\"     Linux libc source code
.\"     Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
.\"     386BSD man pages
.\" Modified 1993-07-24 by Rik Faith (faith@cs.unc.edu)
.\" Modified 2002-07-25 by Walter Harms
.\" 	(walter.harms@informatik.uni-oldenburg.de)
.\"
.TH asin 3 (date) "Linux man-pages (unreleased)"
.SH NAME
asin, asinf, asinl \- arc sine function
.SH LIBRARY
Math library
.RI ( libm ", " \-lm )
.SH SYNOPSIS
.nf
.B #include <math.h>
.PP
.BI "double asin(double " x );
.BI "float asinf(float " x );
.BI "long double asinl(long double " x );
.fi
.PP
.RS -4
Feature Test Macro Requirements for glibc (see
.BR feature_test_macros (7)):
.RE
.PP
.BR asinf (),
.BR asinl ():
.nf
    _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
        || /* Since glibc 2.19: */ _DEFAULT_SOURCE
        || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
.fi
.SH DESCRIPTION
These functions calculate the principal value of the arc sine of
.IR x ;
that is the value whose sine is
.IR x .
.SH RETURN VALUE
On success, these functions return the principal value of the arc sine of
.I x
in radians; the return value is in the range [\-pi/2,\ pi/2].
.PP
If
.I x
is a NaN, a NaN is returned.
.PP
If
.I x
is +0 (\-0),
+0 (\-0) is returned.
.PP
If
.I x