sine series 1-x^2/2!+x^4/4!-x^6/6!+.....

/* Program for sine series 1-x^2/2!+x^4/4!-x^6/6!+..... */

#include<stdio.h>

#include<conio.h>

#include<math.h>

void main()

{

    double x, sum = 1, m;

      int n, i, j, fact, y=2, term=1;

    clrscr();

    printf("\n Enter x value: ");

    scanf("%lf",&x);

   printf("\n Enter no.of terms: ");

   scanf("%d",&n);

    for (i = 1; i < n; i++) {

        fact = 1;

        for (j = 1; j <= y; j++) {

            fact = fact * j;

        }

        term = term * (-1);

        m = term * pow(x, y) / fact;

        sum = sum + m;

        y += 2;

    }

    printf("\n Sine series: %.2lf",sum);

   getch();

}