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

int main(void)
{
	float a = 2.5, b = 0.4, t = -1, w;

	while (t <= 1)
	{
		if (t < 0.1)
			w = sqrt(a*t*t + b*sin(t) + 1);
		else
			if (t > 0.1)
				w = sqrt(a*t*t + b*cos(t) + 1);
			else
				w = a*t + b;
		printf("%f\n",w);
		t += 0.2;
	}
	
	return 0;
}