Sum of Cos(x) Series

Write a C code to find the sum of cos(x) series.

#include <stdio.h>
#include<math.h>

int main (){
    int n,x1,i,j;
    float x,sign,cosx,fact;

    printf("Enter The Number Of Terms In Aseries :\n");
    scanf("%d",&n);

    printf("Enter The Value Of x (In degrees)\n");
    scanf("%f",&x);

    x1=x;

    x=x*(3.142/180.0);   /* convert to degree */

    cosx=1;
    sign=-1;

    for(i=2;i<=2;i=i+2){
        fact=1;
        for(j=1;j<=i;j++){
            fact=fact*j;
        }
        cosx=cosx+(pow(x,i)/fact)*sign;
        sign=sign*(-1);
    }
    printf("Sum of the cosine series = %f\n",cosx);
    printf("The Value of cos(%d) using library function=%f\n",x1,cos(x));
    return 0;
}

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