using System;
using System.Collections.Generic;
using System.Text;
using System.IO;

namespace probetest
{
    class Program
    {
        static void Main(string[] args)
        {
            double n, x1, x2, b, c, k, f, x;
            Console.WriteLine("Enter n");
            n = double.Parse(Console.ReadLine());
            Console.WriteLine("Enter x1");
            x1 = double.Parse(Console.ReadLine());
            Console.WriteLine("Enter x2");
            x2 = double.Parse(Console.ReadLine());
            x = x1;
            k = (x2 - x1) / n;
            do
            {
                Console.WriteLine("Enter b (value 15 is prohibited)");
                b = double.Parse(Console.ReadLine());
                if (b == 15) Console.WriteLine("b=15 is prohibited");
            } while (b == 15);
            Console.WriteLine("Enter c");
            c = double.Parse(Console.ReadLine());
            StreamWriter sw = new StreamWriter("values1.txt");
            sw.WriteLine("b=" + b + " c=" + c + " n=" + n + " x1=" + x1 + " x2=" + x2);
            for (int i = 0; i < n; i++)
            {
                f = (Math.Sqrt(c * c - 5 * c + 4) / (b * b - 225)) * (Math.Sin(x) + Math.Cos(x) * Math.Cos(x));
                sw.WriteLine("n=" + (i + 1) + " => f=" + f);
                x = x + k;
            }
            sw.Close();
        }
    }
}