Law of Cosines converting to degrees error

So I'm trying to find angles A,B,C using law of cosines and I want the answers to be in degrees and the formula to convert the answer to degrees is angle*PI/180. However the answer does not convert to degrees what am I doing wrong?

Code:

`#include "stdafx.h"`

#include <iostream>

#include <iomanip>

#include <cmath>

#define PI 3.14

using namespace std;

int main()

{

double A,B,C,a,b,c,b1,b2,h,R,L,T,x;

//This is for angle a

a = 10.0;

b = 7.0;

c = 5.0;

A = (b*b+c*c-a*a)/(2.0*b*c);

A = acos(A)*PI/180.0;

cout <<"\n\n\t\tThe value of angle A ="<<A;

//This is for angle b

a = 11.6;

b = 15.2;

c = 7.4;

B = (a*a+c*c-b*b)/(2.0*a*c);

B = acos(B)*PI/180.0;

cout<<"\n\n\t\tThe value of angle B ="<<B;

//This is for angle c

a = 2.0;

b = 3.0;

c = 4.0;

C = (a*a+b*b-c*c)/(2.0*a*b);

C = acos(C)*PI/180.0;

cout<<"\n\n\t\tThe value of angle C ="<<C;

cout<<"\n\n\n\n";

return 0;

}