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sincos(3) — Linux manual page

NAME \|LIBRARY \|SYNOPSIS \|DESCRIPTION \|RETURN VALUE \|ERRORS \|ATTRIBUTES \|STANDARDS \|HISTORY \|NOTES \|BUGS \|SEE ALSO \|COLOPHON

sincos(3)                Library Functions Manualsincos(3)

NAME top

       sincos, sincosf, sincosl - calculate sin and cos simultaneously

LIBRARY top

       Math library (libm,-lm)

SYNOPSIS top

#define _GNU_SOURCE/* See feature_test_macros(7) */#include <math.h>void sincos(doublex, double *sin, double *cos);void sincosf(floatx, float *sin, float *cos);void sincosl(long doublex, long double *sin, long double *cos);

DESCRIPTION top

       Several applications need sine and cosine of the same anglex.       These functions compute both at the same time, and store the       results in*sin and*cos.  Using this function can be more       efficient than two separate calls tosin(3) andcos(3).       Ifx is a NaN, a NaN is returned in*sin and*cos.       Ifx is positive infinity or negative infinity, a domain error       occurs, and a NaN is returned in*sin and*cos.

RETURN VALUE top

       These functions returnvoid.

ERRORS top

       Seemath_error(7) for information on how to determine whether an       error has occurred when calling these functions.       The following errors can occur:       Domain error:x is an infinityerrno is set toEDOM(but see BUGS).  An invalid floating-              point exception (FE_INVALID) is raised.

ATTRIBUTES top

       For an explanation of the terms used in this section, seeattributes(7).       ┌──────────────────────────────────────┬───────────────┬─────────┐       │Interface│Attribute│Value│       ├──────────────────────────────────────┼───────────────┼─────────┤       │sincos(),sincosf(),sincosl()       │ Thread safety │ MT-Safe │       └──────────────────────────────────────┴───────────────┴─────────┘

STANDARDS top

       GNU.

HISTORY top

       glibc 2.1.

NOTES top

       To see the performance advantage ofsincos(), it may be necessary       to disablegcc(1) built-in optimizations, using flags such as:           cc -O -lm -fno-builtin prog.c

BUGS top

       Before glibc 2.22, the glibc implementation did not seterrno toEDOMwhen a domain error occurred.

COLOPHON top

       This page is part of theman-pages (Linux kernel and C library       user-space interface documentation) project.  Information about       the project can be found at        ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report       for this manual page, see       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.       This page was obtained from the tarball man-pages-6.15.tar.gz       fetched from       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on       2025-08-11.  If you discover any rendering problems in this HTML       version of the page, or you believe there is a better or more up-       to-date source for the page, or you have corrections or       improvements to the information in this COLOPHON (which isnot       part of the original manual page), send a mail to       man-pages@man7.orgLinux man-pages 6.15            2025-05-17sincos(3)

Pages that refer to this page:cos(3), sin(3)

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