using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApp5
{

    public partial class Form1 : Form
    {
        int n = 1;

        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            double S = 0;
            double Sk;
            double y;

            double x = Convert.ToDouble(textBox1.Text);
            if (x <= 1 && x >= 0.1f)
            {
                for (int i = 1; i <= 10; i++)
                {

                    S+=  Math.Pow(x, 2 * i) / (Factorial(2 * i));

                }
                Sk = 1 + S;

                y = (Math.Pow((Math.E),x) + Math.Pow((Math.E), -x)) / 2;



                textBox2.Text = Sk.ToString();
                textBox3.Text = y.ToString();

            }
            else
            {
                MessageBox.Show ("Введите 0.1<=x<=1" );
            }


        }



        static long Factorial(long x)
        {
            return (x == 0) ? 1 : x * Factorial(x - 1);
        }




        static void FuncH(int H, int xn,int xk)
        {
            H = (xk - xn) / 10;
        }



        private void textBox1_TextChanged(object sender, EventArgs e)
        {

        }

        private void label1_Click(object sender, EventArgs e)
        {

        }

        private void textBox2_TextChanged(object sender, EventArgs e)
        {

        }

        private void textBox3_TextChanged(object sender, EventArgs e)
        {

        }

        private void button2_Click(object sender, EventArgs e)
        {
            textBox1.Text = "";
            textBox2.Text = "";
            textBox3.Text = "";
        }

        private void button3_Click(object sender, EventArgs e)
        {
            Close();
        }
    }
}