[~/Code/test/ANSI C/]
% cat sin.c
#include <stdio.h>
#include <math.h>
int main()
{
double d = 43998769152.000000;
printf("%16le\n",sin(d));
printf("%16le\n",sin(43998769152.000000));
}
[~/Code/test/ANSI C/]
% gcc -o sin sin.c -lm;./sin
-4.081937e-09
-4.025292e-09