C program to print Cosine series

Below is the code to print Cosine series

#include <stdio.h>
int main(){
    int i,n;
    float t,x,sum;
    printf("Enter degrees:");
    scanf("%f",&x);
    printf("Enter number of values:");
    scanf("%d",&n);
    x=x*3.14/180;
    t=x;
    sum=x;
    for(i=1;i<=n;i++){
        t=(float)(t*(-1)*x)/(2*i*(2*i-1));
        printf("%f\n",t);
        sum+=t;
    }
    printf("Sum of cosine series is %f",sum);
}

Output:

Enter degrees:45
Enter number of values:5
-0.308113
0.020156
-0.000527
0.000007
-0.000000
Sum of cosine series is 0.496523