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)
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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
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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16 .\" manual page may be incorrect or out-of-date.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
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18 .\" the use of the information contained herein. The author(s) may not
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20 .\" which is licensed free of charge, as they might when working
23 .\" Formatted or processed versions of this manual, if unaccompanied by
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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 2002-07-27 by Walter Harms
33 .\" (walter.harms@informatik.uni-oldenburg.de)
35 .TH ASINH 3 2021-03-22 "GNU" "Linux Programmer's Manual"
37 asinh, asinhf, asinhl \- inverse hyperbolic sine function
42 .BI "double asinh(double " x );
43 .BI "float asinhf(float " x );
44 .BI "long double asinhl(long double " x );
50 Feature Test Macro Requirements for glibc (see
51 .BR feature_test_macros (7)):
56 _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
57 || _XOPEN_SOURCE >= 500
58 .\" || _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED
59 || /* Since glibc 2.19: */ _DEFAULT_SOURCE
60 || /* Glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
66 _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
67 || /* Since glibc 2.19: */ _DEFAULT_SOURCE
68 || /* Glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
71 These functions calculate the inverse hyperbolic sine of
73 that is the value whose hyperbolic sine is
76 On success, these functions return the inverse hyperbolic sine of
81 is a NaN, a NaN is returned.
85 is +0 (\-0), +0 (\-0) is returned.
89 is positive infinity (negative infinity),
90 positive infinity (negative infinity) is returned.
92 .\" POSIX.1-2001 documents an optional range error for subnormal x;
93 .\" glibc 2.8 does not do this.
97 For an explanation of the terms used in this section, see
105 Interface Attribute Value
110 T} Thread safety MT-Safe
116 C99, POSIX.1-2001, POSIX.1-2008.
118 The variant returning