Funkcje trygonometryczne w C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {

            double x = double.Parse(Console.ReadLine(), System.Globalization.CultureInfo.InvariantCulture);
           
           

            double radian = x*Math.PI/180;
            double sinus = Math.Sin(radian);
            double cosinus = Math.Cos(radian);



           
            
            Console.WriteLine(" {0}", x.ToString("F4", System.Globalization.CultureInfo.InvariantCulture));
            Console.WriteLine(" {0}", x.ToString("F4", System.Globalization.CultureInfo.InvariantCulture));
            Console.WriteLine(" {0}", x.ToString("F4", System.Globalization.CultureInfo.InvariantCulture));

            Console.ReadLine();
        }
    }
}