1SINH(3P)                   POSIX Programmer's Manual                  SINH(3P)
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PROLOG

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.
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11

NAME

13       sinh, sinhf, sinhl — hyperbolic sine functions
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SYNOPSIS

16       #include <math.h>
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18       double sinh(double x);
19       float sinhf(float x);
20       long double sinhl(long double x);
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DESCRIPTION

23       The functionality described on this reference page is aligned with  the
24       ISO C  standard.  Any  conflict between the requirements described here
25       and the ISO C standard is unintentional. This  volume  of  POSIX.1‐2008
26       defers to the ISO C standard.
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28       These functions shall compute the hyperbolic sine of their argument x.
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30       An  application  wishing to check for error situations should set errno
31       to zero and  call  feclearexcept(FE_ALL_EXCEPT)  before  calling  these
32       functions. On return, if errno is non-zero or fetestexcept(FE_INVALID |
33       FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW) is non-zero,  an  error  has
34       occurred.
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RETURN VALUE

37       Upon successful completion, these functions shall return the hyperbolic
38       sine of x.
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40       If the result would cause an overflow, a range error  shall  occur  and
41       ±HUGE_VAL,  ±HUGE_VALF,  and ±HUGE_VALL (with the same sign as x) shall
42       be returned as appropriate for the type of the function.
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44       If x is NaN, a NaN shall be returned.
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46       If x is ±0 or ±Inf, x shall be returned.
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48       If x is subnormal, a range error may occur
49       and x should be returned.
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51       If x is not returned, sinh(), sinhf(),  and  sinhl()  shall  return  an
52       implementation-defined  value  no  greater  in  magnitude than DBL_MIN,
53       FLT_MIN, and LDBL_MIN, respectively.
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ERRORS

56       These functions shall fail if:
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58       Range Error The result would cause an overflow.
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60                   If the integer expression (math_errhandling  &  MATH_ERRNO)
61                   is  non-zero,  then errno shall be set to [ERANGE].  If the
62                   integer expression (math_errhandling &  MATH_ERREXCEPT)  is
63                   non-zero,  then the overflow floating-point exception shall
64                   be raised.
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66       These functions may fail if:
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68       Range Error The value x is subnormal.
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70                   If the integer expression (math_errhandling  &  MATH_ERRNO)
71                   is  non-zero,  then errno shall be set to [ERANGE].  If the
72                   integer expression (math_errhandling &  MATH_ERREXCEPT)  is
73                   non-zero, then the underflow floating-point exception shall
74                   be raised.
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76       The following sections are informative.
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EXAMPLES

79       None.
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APPLICATION USAGE

82       On  error,  the  expressions  (math_errhandling   &   MATH_ERRNO)   and
83       (math_errhandling  & MATH_ERREXCEPT) are independent of each other, but
84       at least one of them must be non-zero.
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RATIONALE

87       None.
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FUTURE DIRECTIONS

90       None.
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SEE ALSO

93       asinh(), cosh(), feclearexcept(), fetestexcept(), isnan(), tanh()
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95       The Base Definitions volume of POSIX.1‐2008, Section 4.19, Treatment of
96       Error Conditions for Mathematical Functions, <math.h>
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99       Portions  of  this text are reprinted and reproduced in electronic form
100       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
101       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
102       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
103       cal  and  Electronics  Engineers,  Inc  and  The  Open Group.  (This is
104       POSIX.1-2008 with the 2013 Technical Corrigendum  1  applied.)  In  the
105       event of any discrepancy between this version and the original IEEE and
106       The Open Group Standard, the original IEEE and The Open Group  Standard
107       is  the  referee document. The original Standard can be obtained online
108       at http://www.unix.org/online.html .
109
110       Any typographical or formatting errors that appear  in  this  page  are
111       most likely to have been introduced during the conversion of the source
112       files to man page format. To report such errors,  see  https://www.ker
113       nel.org/doc/man-pages/reporting_bugs.html .
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117IEEE/The Open Group                  2013                             SINH(3P)
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