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a guest Sep 19th, 2019 95 Never
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  1. using System;
  2. using System.Collections.Generic;
  3. using System.Linq;
  4. using System.Text;
  5. using System.Threading.Tasks;
  6.  
  7. namespace Cos
  8. {
  9.     class Program
  10.     {
  11.         static void Main(string[] args)
  12.         {
  13.             Console.Write("Введите X:");
  14.             double x = double.Parse(Console.ReadLine());
  15.             double sum = 0.0;
  16.             Console.Write("Введите N:");
  17.             int N = int.Parse(Console.ReadLine());
  18.             double Q = 1.0;
  19.             for (int n = 1; n < N; n++)
  20.             {
  21.                 sum += Q;
  22.                 Q*=   -x/ (2 * n);
  23.                 Console.Write("n={0}\t, Q={1}\t,Cумма={2}\t \n", n, Q, sum.ToString());
  24.             }
  25.             Console.WriteLine("Сумма={0}", sum.ToString());
  26.             Console.WriteLine("Cos(-x)={0}\t", Math.Cos(-x));
  27.             Console.ReadKey();
  28.         }
  29.     }
  30. }
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