c++泰勒公式计算cosx

C++中使用泰勒公式计算cos(x)的代码如下所示：

#include <iostream>
#include <cmath>

double taylorCos(double x, int n) {
    double result = 1.0;
    double term = 1.0;

    for (int i = 1; i <= n; ++i) {
        term *= -x * x / ((2 * i - 1) * (2 * i));
        result += term;
    }

    return result;
}

int main() {
    double x;
    int n;

    std::cout << "Enter the value of x: ";
    std::cin >> x;

    std::cout << "Enter the number of terms (n): ";
    std::cin >> n;

    double cosValue = taylorCos(x, n);
    std::cout << "cos(" << x << ") = " << cosValue << std::endl;

    return 0;
}

这段代码通过迭代计算泰勒级数的每一项来逼近cos(x)的值。用户需要输入x的值以及要计算的级数项数n。程序将打印出计算得到的cos(x)的近似值。