Using System;
namespace ConsoleApplication28 {
class Program {
static void Main() {
Console.Write("Введите a: ");
int a = Convert.ToInt32(Console.ReadLine());
Console.Write("Введите b: ");
int b = Convert.ToInt32(Console.ReadLine());
double z1 = (Math.Sin(a) + Math.Cos(2 * b - a)) / (Math.Cos(a) - Math.Sin(2 * b - a));
double z2 = (1 + Math.Sin(2) * b) / (Math.Cos(2) * b);
Console.WriteLine("z1 = " + z1);
Console.WriteLine("z2 = " + z2);
Console.ReadKey();
}}}