1SINH(3P) POSIX Programmer's Manual SINH(3P)
2
6 This manual page is part of the POSIX Programmer's Manual. The Linux
7 implementation of this interface may differ (consult the corresponding
8 Linux manual page for details of Linux behavior), or the interface may
9 not be implemented on Linux.
10
12 sinh, sinhf, sinhl — hyperbolic sine functions
13
15 #include <math.h>
16 double sinh(double x);
18 float sinhf(float x);
19 long double sinhl(long double x);
20
22 The functionality described on this reference page is aligned with the
23 ISO C standard. Any conflict between the requirements described here
24 and the ISO C standard is unintentional. This volume of POSIX.1‐2017
25 defers to the ISO C standard.
26 These functions shall compute the hyperbolic sine of their argument x.
28 An application wishing to check for error situations should set errno
30 to zero and call feclearexcept(FE_ALL_EXCEPT) before calling these
31 functions. On return, if errno is non-zero or fetestexcept(FE_INVALID |
32 FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW) is non-zero, an error has
33 occurred.
34
36 Upon successful completion, these functions shall return the hyperbolic
37 sine of x.
38 If the result would cause an overflow, a range error shall occur and
40 ±HUGE_VAL, ±HUGE_VALF, and ±HUGE_VALL (with the same sign as x) shall
41 be returned as appropriate for the type of the function.
42 If x is NaN, a NaN shall be returned.
44 If x is ±0 or ±Inf, x shall be returned.
46 If x is subnormal, a range error may occur
48 and x should be returned.
49 If x is not returned, sinh(), sinhf(), and sinhl() shall return an
51 implementation-defined value no greater in magnitude than DBL_MIN,
52 FLT_MIN, and LDBL_MIN, respectively.
53
55 These functions shall fail if:
56 Range Error The result would cause an overflow.
58 If the integer expression (math_errhandling & MATH_ERRNO)
60 is non-zero, then errno shall be set to [ERANGE]. If the
61 integer expression (math_errhandling & MATH_ERREXCEPT) is
62 non-zero, then the overflow floating-point exception shall
63 be raised.
64 These functions may fail if:
66 Range Error The value x is subnormal.
68 If the integer expression (math_errhandling & MATH_ERRNO)
70 is non-zero, then errno shall be set to [ERANGE]. If the
71 integer expression (math_errhandling & MATH_ERREXCEPT) is
72 non-zero, then the underflow floating-point exception shall
73 be raised.
74 The following sections are informative.
76
78 None.
79
81 On error, the expressions (math_errhandling & MATH_ERRNO) and
82 (math_errhandling & MATH_ERREXCEPT) are independent of each other, but
83 at least one of them must be non-zero.
84
86 None.
87
89 None.
90
92 asinh(), cosh(), feclearexcept(), fetestexcept(), isnan(), tanh()
93 The Base Definitions volume of POSIX.1‐2017, Section 4.20, Treatment of
95 Error Conditions for Mathematical Functions, <math.h>
96
98 Portions of this text are reprinted and reproduced in electronic form
99 from IEEE Std 1003.1-2017, Standard for Information Technology -- Por‐
100 table Operating System Interface (POSIX), The Open Group Base Specifi‐
101 cations Issue 7, 2018 Edition, Copyright (C) 2018 by the Institute of
102 Electrical and Electronics Engineers, Inc and The Open Group. In the
103 event of any discrepancy between this version and the original IEEE and
104 The Open Group Standard, the original IEEE and The Open Group Standard
105 is the referee document. The original Standard can be obtained online
106 at http://www.opengroup.org/unix/online.html .
107 Any typographical or formatting errors that appear in this page are
109 most likely to have been introduced during the conversion of the source
110 files to man page format. To report such errors, see https://www.ker‐
111 nel.org/doc/man-pages/reporting_bugs.html .
112IEEE/The Open Group 2017 SINH(3P)