vova variant 11

using System;

namespace vova_task1
{
    class Program
    {

        static double GradToRad(double val)
        {
            return Math.PI * val / 180.0;
        }
        static void Main(string[] args)
        {
            double z1, z2, alpha;
            Console.Write("enter alpha: ");
            alpha = double.Parse(Console.ReadLine());
            alpha = GradToRad(alpha);
            z1 = (1 - 2*Math.Pow(Math.Sin(alpha),2)) / (1 + Math.Sin(2*alpha));
            z2 = (1 - Math.Tan(alpha)) / (1 + Math.Tan(alpha));
            Console.WriteLine($"{z1:F5} {z2:F5}");
            Console.ReadKey();
        }
    }
}