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May 20th, 2019
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  1. #define _CRT_SECURE_NO_WARNINGS
  2. #include <stdio.h>
  3. #include <stdlib.h>
  4. #include <math.h>
  5. int main()
  6. {
  7. int n, i = 1;
  8. scanf_s("%d", &n); //n - количество членов ряда
  9. double A, F1 = 1.0, F2, p_otn, p_abs, b = 1.0;
  10. printf("A=");
  11. scanf("%lf", &A);
  12. while (i < n)
  13. {
  14. b = -b * A*A / ((2 * i - 1) * 2 * i);
  15. F1 = F1 + b;
  16. i++;
  17. }
  18. F2 = cos(A);
  19. p_abs = fabs(F1 - F2);
  20. p_otn = p_abs / F2;
  21. printf(" n=%d\n", n);
  22. printf(" F1=%.16lf\n", F1);
  23. printf(" F2=%.16lf\n", F2);
  24. printf(" p_abs=%.16lf\n", p_abs);
  25. printf(" p_otn=%.16lf\n", p_otn);
  26. return 0;
  27. }
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