sincos, sincosf, sincosl - calculate sin and cos simultaneously
#define _GNU_SOURCE /* See feature_test_macros(7) */ #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);
Several applications need sine and cosine of the same angle
x. These functions compute both at the same time, and store the results in
*cos. Using this function can be more efficient than two separate calls to sin(3) and cos(3).
x is a NaN, a NaN is returned in
x is positive infinity or negative infinity, a domain error occurs, and a NaN is returned in
These functions return
See math_error(7) for information on how to determine whether an error has occurred when calling these functions.
The following errors can occur:
xis an infinity
An invalid floating-point exception (FE_INVALID) is raised.
These functions do not set
These functions first appeared in glibc in version 2.1.
For an explanation of the terms used in this section, see attributes(7).
|sincos(), sincosf(), sincosl()||Thread safety||MT-Safe|
These functions are GNU extensions.
cc -O -lm -fno-builtin prog.c
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