Trigonometry missing? Post: 302540607

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sincos

SINCOS(3)						     Linux Programmer's Manual							 SINCOS(3)

NAME

       sincos, sincosf, sincosl - calculate sin and cos simultaneously

SYNOPSIS

       #define _GNU_SOURCE
       #include <math.h>

       void sincos(double x, double *sin, double *cos);
       void sincosf(float x, float *sin, float *cos);
       void sincosl(long double x, long double *sin, long double *cos);

       Link with -lm.

DESCRIPTION

       Several	applications  need  sine  and cosine of the same angle x.  This function computes both at the same time, and stores the results in
       *sin and *cos.

       If x is a NaN, a NaN is returned in *sin and *cos.

       If x is positive infinity or negative infinity, a domain error occurs, and a NaN is returned in *sin and *cos.

RETURN VALUE

       These functions return void.

ERRORS

       See math_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 infinity
	      An invalid floating-point exception (FE_INVALID) is raised.

       These functions do not set errno.

VERSIONS

       These functions first appeared in glibc in version 2.1.

CONFORMING TO

       This function is a GNU extension.

SEE ALSO

       cos(3), sin(3), tan(3), feature_test_macros(7)

COLOPHON

       This page is part of release 3.25 of the Linux man-pages project.  A description of the project, and information about reporting bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

GNU
								    2008-08-11								 SINCOS(3)