asinhf(3)

1asinh(3)                   Library Functions Manual                   asinh(3)
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NAME

6       asinh, asinhf, asinhl - inverse hyperbolic sine function
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LIBRARY

9       Math library (libm, -lm)
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SYNOPSIS

12       #include <math.h>
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14       double asinh(double x);
15       float asinhf(float x);
16       long double asinhl(long double x);
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18   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
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20       asinh():
21           _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
22               || _XOPEN_SOURCE >= 500
23               || /* Since glibc 2.19: */ _DEFAULT_SOURCE
24               || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
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26       asinhf(), asinhl():
27           _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
28               || /* Since glibc 2.19: */ _DEFAULT_SOURCE
29               || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
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DESCRIPTION

32       These functions calculate the inverse hyperbolic sine of x; that is the
33       value whose hyperbolic sine is x.
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RETURN VALUE

36       On success, these functions return the inverse hyperbolic sine of x.
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38       If x is a NaN, a NaN is returned.
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40       If x is +0 (-0), +0 (-0) is returned.
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42       If x is positive infinity (negative infinity), positive infinity (nega‐
43       tive infinity) is returned.
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ERRORS

46       No errors occur.
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ATTRIBUTES

49       For  an  explanation  of  the  terms  used  in  this  section,  see at‐
50       tributes(7).
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52       ┌────────────────────────────────────────────┬───────────────┬─────────┐
53       │Interface                                   │ Attribute     │ Value   │
54       ├────────────────────────────────────────────┼───────────────┼─────────┤
55       │asinh(), asinhf(), asinhl()                 │ Thread safety │ MT-Safe │
56       └────────────────────────────────────────────┴───────────────┴─────────┘
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STANDARDS

59       C11, POSIX.1-2008.
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HISTORY

62       C99, POSIX.1-2001.
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64       The variant returning double also conforms to SVr4, 4.3BSD.
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