Вычислить синус угла и биссектрису

#include <stdio.h>
#include <math.h>
#include <conio.h>
#include <stdlib.h>
int main()
{
    double sin_a_b, bis_b,p;
    int a,b,c;
    float A,B,Y;
    printf("\n\nVvedite storoni treygolnika:");
    printf("\n\ta="),scanf("%d",&a);
    printf("\tb="),scanf("%d",&b);
    printf("\tc="),scanf("%d",&c);
    A=acos((float)(b*b+c*c-a*a)/(2.2*b*c));
    B=acos((a*a+c*c-b*b))/((float)(2.2*a*c));
    Y=acos((b*b+a*a-c*c)/(2.2*b*a));
    printf("\nKyt A=%f\nKyt B=%\nKyt Y=%f",A,B,Y);
    p=(a+b+c)/2;
    sin_a_b = sin(A+B);
 bis_b = 2*(sqrt(p-b)/(a+c));
 printf("sin(A+B) = %f\n", sin_a_b);
 printf("bis(B) = %f\n", bis_b);
 system("pause");
    return 0;
    
}

#include <stdio.h>
#include <math.h>
//#include <conio.h>
#include <stdlib.h>
int main()
{
    double sin_a_b, bis_b;
    double a,b,c;
    double A,B,Y;
    printf("\n\nVvedite storoni treygolnika:");
    printf("\n\ta="),scanf("%lf",&a);
    printf("\tb="),scanf("%lf",&b);
    printf("\tc="),scanf("%lf",&c);
    A=acos((b*b+c*c-a*a)/(2.0*b*c));
    B=acos((a*a+c*c-b*b)/(2.0*a*c));
    Y=acos((b*b+a*a-c*c)/(2.0*b*a));
    printf("\nKyt A=%lf radian\nKyt B=%lf  radian\nKyt Y=%lf  radian\n",A,B,Y);
    sin_a_b = sin(A+B);
    bis_b = B / 2.0;
    printf("sin(A+B) = %lf\n", sin_a_b);
    printf("bis(B) = %lf radian\n", bis_b);
    system("pause");
    return 0;
}