Movatterモバイル変換

sin(3p) — Linux manual page

SIN(3P)                 POSIX Programmer's ManualSIN(3P)

PROLOG        top

       This manual page is part of the POSIX Programmer's Manual.  The       Linux implementation of this interface may differ (consult the       corresponding Linux manual page for details of Linux behavior), or       the interface may not be implemented on Linux.

NAME        top

       sin, sinf, sinl — sine function

SYNOPSIS        top

       #include <math.h>       double sin(doublex);       float sinf(floatx);       long double sinl(long doublex);

DESCRIPTION        top

       The functionality described on this reference page is aligned with       the ISO C standard. Any conflict between the requirements       described here and the ISO C standard is unintentional. This       volume of POSIX.1‐2017 defers to the ISO C standard.       These functions shall compute the sine of their argumentx,       measured in radians.       An application wishing to check for error situations should seterrno to zero and callfeclearexcept(FE_ALL_EXCEPT) before calling       these functions. On return, iferrno is non-zero orfetestexcept(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW |       FE_UNDERFLOW) is non-zero, an error has occurred.

RETURN VALUE        top

       Upon successful completion, these functions shall return the sine       ofx.       Ifx is NaN, a NaN shall be returned.       Ifx is ±0,x shall be returned.       Ifx is subnormal, a range error may occur       andx should be returned.       Ifx is not returned,sin(),sinf(), andsinl() shall return an       implementation-defined value no greater in magnitude than DBL_MIN,       FLT_MIN, and LDBL_MIN, respectively.       Ifx is ±Inf, a domain error shall occur, and a NaN shall be       returned.

ERRORS        top

       These functions shall fail if:       Domain Error                   Thex argument is ±Inf.                   If the integer expression (math_errhandling &                   MATH_ERRNO) is non-zero, thenerrno shall be set to[EDOM].  If the integer expression (math_errhandling &                   MATH_ERREXCEPT) is non-zero, then the invalid                   floating-point exception shall be raised.       These functions may fail if:       Range Error The value ofx is subnormal                   If the integer expression (math_errhandling &                   MATH_ERRNO) is non-zero, thenerrno shall be set to[ERANGE].  If the integer expression (math_errhandling                   & MATH_ERREXCEPT) is non-zero, then the underflow                   floating-point exception shall be raised.The following sections are informative.

EXAMPLES        top

Taking the Sine of a 45-Degree Angle           #include <math.h>           ...           double radians = 45.0 * M_PI / 180;           double result;           ...           result = sin(radians);

APPLICATION USAGE        top

       These functions may lose accuracy when their argument is near a       multiple of π or is far from 0.0.       On error, the expressions (math_errhandling & MATH_ERRNO) and       (math_errhandling & MATH_ERREXCEPT) are independent of each other,       but at least one of them must be non-zero.

RATIONALE        top

       None.

FUTURE DIRECTIONS        top

       None.

SEE ALSO        top

asin(3p),feclearexcept(3p),fetestexcept(3p),isnan(3p)       The Base Definitions volume of POSIX.1‐2017,Section 4.20,Treatment of Error Conditions for Mathematical Functions,math.h(0p)

COPYRIGHT        top

       Portions of this text are reprinted and reproduced in electronic       form from IEEE Std 1003.1-2017, Standard for Information       Technology -- Portable Operating System Interface (POSIX), The       Open Group Base Specifications Issue 7, 2018 Edition, Copyright       (C) 2018 by the Institute of Electrical and Electronics Engineers,       Inc and The Open Group.  In the event of any discrepancy between       this version and the original IEEE and The Open Group Standard,       the original IEEE and The Open Group Standard is the referee       document. The original Standard can be obtained online athttp://www.opengroup.org/unix/online.html .       Any typographical or formatting errors that appear in this page       are most likely to have been introduced during the conversion of       the source files to man page format. To report such errors, seehttps://www.kernel.org/doc/man-pages/reporting_bugs.html .IEEE/The Open Group                2017SIN(3P)

Pages that refer to this page:math.h(0p), asin(3p), cos(3p), sinl(3p)

HTML rendering created 2025-09-06 byMichael Kerrisk, author ofThe Linux Programming Interface. For details of in-depthLinux/UNIX system programming training courses that I teach, lookhere. Hosting byjambit GmbH.