Manual Pages  — SINCOS

sincos, sincosf, sincosl – sine and cosine functions

LIBRARY SYNOPSIS DESCRIPTION RETURN VALUES SEE ALSO HISTORY

Math Library (libm, -lm)

#include <math.h>

void
sincos(double x, double *s, double *c);

void
sincosf(float x, float *s, float *c);

void
sincosl(long double x, long double *s, long double *c);

The sincos(), sincosf(), and sincosl() functions compute the sine and cosine of x. Using these functions allows argument reduction to occur only once instead of twice with individual invocations of sin() and cos(). Like sin() and cos(), a large magnitude argument may yield a result with little or no significance.

Upon returning from sincos(), sincosf(), and sincosl(), the memory pointed to by *s and *c are assigned the values of sine and cosine, respectively.

These functions were added to FreeBSD 9.0 to aid in writing various complex function contained in ISO/IEC 9899:1999 ("ISO C99").