Nested for Loops in Java

import java.util.Scanner;
 
public class SinCosSeries
{
    // Method to calculate factorial
    public static long factorial(int n)
    {
        long fact = 1;
        for(int i = 1; i <= n; i++)
        {
            fact *= i;
        }
        return fact;
    }
 
    public static void main(String[] args)
    {
        Scanner sc = new Scanner(System.in);
 
        System.out.println("Enter value of x (in radians):");
        double x = sc.nextDouble();
 
        System.out.println("Enter number of terms:");
        int n = sc.nextInt();
 
        double sinx = 0;
        double cosx = 0;
        int sign = 1;
 
        // Computing sin x
        for(int i = 1, count = 1; count <= n; i += 2, count++)
        {
            sinx += sign * (Math.pow(x, i) / factorial(i));
            sign *= -1;
        }
 
        sign = 1;
 
        // Computing cos x
        for(int i = 0, count = 1; count <= n; i += 2, count++)
        {
            cosx += sign * (Math.pow(x, i) / factorial(i));
            sign *= -1;
        }
 
        System.out.println("sin x = " + sinx);
        System.out.println("cos x = " + cosx);
 
        sc.close();
    }
}