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

int main() {
    float th; /* Theta, angle in radians */
    float sum;
    printf("Enter angle Theta in radians: ");
    scanf("%g", &th);
    sum = sin(th)*sin(th) + cos(th)*cos(th);
    printf("sin-squared + cos-squared = %g\n",
	   sum);
    return 0;
}