Answer to Question #197925 in Electrical Engineering for mat

Question

Write a program that takes the value of positive integer N and outputs the sum of the first N good numbers.

Answer 1

#include <stdio.h>

#include <math.h>

int main() {

    double x, s, tn;

    int n, i;

    

    printf("Enter x: ");

    scanf("%lf", &x);

    printf("Enter n: ");

    scanf("%d", &n);

    

    /* The first term */

    tn = x;     

    s = tn;

    

    for (i=1; i<n; i++) {

        /* Next term */

        tn = -tn * x*x / (2*i) / (2*i + 1);

        s += tn;

    }

    

    printf("Approximation to sin(%f) with %d terms is %f (real value is %f)\n",

           x, n, s, sin(x));

    return 0;           

    

}