1 .\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
2 .\" and Copyright 2008, Linux Foundation, written by Michael Kerrisk
3 .\" <mtk.manpages@gmail.com>
5 .\" %%%LICENSE_START(VERBATIM)
6 .\" Permission is granted to make and distribute verbatim copies of this
7 .\" manual provided the copyright notice and this permission notice are
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10 .\" Permission is granted to copy and distribute modified versions of this
11 .\" manual under the conditions for verbatim copying, provided that the
12 .\" entire resulting derived work is distributed under the terms of a
13 .\" permission notice identical to this one.
15 .\" Since the Linux kernel and libraries are constantly changing, this
16 .\" manual page may be incorrect or out-of-date. The author(s) assume no
17 .\" responsibility for errors or omissions, or for damages resulting from
18 .\" the use of the information contained herein. The author(s) may not
19 .\" have taken the same level of care in the production of this manual,
20 .\" which is licensed free of charge, as they might when working
23 .\" Formatted or processed versions of this manual, if unaccompanied by
24 .\" the source, must acknowledge the copyright and authors of this work.
27 .\" References consulted:
28 .\" Linux libc source code
29 .\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
31 .\" Modified 1993-07-24 by Rik Faith (faith@cs.unc.edu)
32 .\" Modified 2002-07-25 by Walter Harms
33 .\" (walter.harms@informatik.uni-oldenburg.de)
35 .TH ASIN 3 2021-03-22 "" "Linux Programmer's Manual"
37 asin, asinf, asinl \- arc sine function
42 .BI "double asin(double " x );
43 .BI "float asinf(float " x );
44 .BI "long double asinl(long double " x );
50 Feature Test Macro Requirements for glibc (see
51 .BR feature_test_macros (7)):
57 _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
58 || /* Since glibc 2.19: */ _DEFAULT_SOURCE
59 || /* Glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
62 These functions calculate the principal value of the arc sine of
64 that is the value whose sine is
67 On success, these functions return the principal value of the arc sine of
69 in radians; the return value is in the range [\-pi/2,\ pi/2].
73 is a NaN, a NaN is returned.
82 is outside the range [\-1,\ 1],
83 a domain error occurs,
84 and a NaN is returned.
86 .\" POSIX.1-2001 documents an optional range error for subnormal x;
87 .\" glibc 2.8 does not do this.
91 for information on how to determine whether an error has occurred
92 when calling these functions.
94 The following errors can occur:
96 Domain error: \fIx\fP is outside the range [\-1,\ 1]
100 An invalid floating-point exception
104 For an explanation of the terms used in this section, see
112 Interface Attribute Value
117 T} Thread safety MT-Safe
123 C99, POSIX.1-2001, POSIX.1-2008.
125 The variant returning