#include <stdio.h>
#include <math.h>

int main(int argc, char *argv[])
{
	double n = 2.0;

	for (int i = 0; i < 30; i++)
	{
		n *= 2;
		double x = 1.0/n;
		printf("%d - %.20g\n", i, 1.0 - x/sin(x));
	}
}