Вариант 21
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#include <iostream>
#include <cmath>
using namespace std;
int main()
{
double x, k, Z;
cout << "Вариант 21" << endl;
//cout << "Введите x" << endl;
cin >> x;
k = 1 + pow(x ,2);
setlocale(LC_ALL,"Russian");
if (k <= 0) {Z = 2 * cos(3*x)/sin(3*x) ;}
else {
if (cos (x) == 0) {cout << "Решений нет";}
else { Z = 2 * cos(3*x)/sin(3*x) - log(cos(x)) / log (k) ;}
;}
cout << "Z = " << Z << endl;
return 0;
}
Cpp
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