#include <iostream>
#include <cmath>
 
using namespace std;

int main() {
 //var
 double z1, z2, angleA, angleB;
 const double pi = 3.14159;

 //set value of angles
 cout << "Enter value of angleA: ";
 cin >> angleA;
 cout << "Enter value of angleB: ";
 cin >> angleB;
 
 //get angles
 angleA *= pi/180;
 angleB *= pi/180;

 //get result
 z1 = pow(cos(angleA) - cos(angleB), 2) - pow(sin(angleA) - sin(angleB), 2);
 z2 = -4*pow((sin(angleA - angleB)/2), 2)*cos(angleA + angleB);

 //result
 cout << "z1 = " << z1 << endl;
 cout << "z2 = " << z2 << endl;

 //program end
 return 0;
}