To find the value of Cosine function using power series

The program

#include<stdio.h>

int main()

{

 int i, n;

 float x,deg, sum=1, t=1;

printf("-:COSINE POWER SERIES:- \n\n");

printf("ENTER THE VALUE OF x OF cosx SERIES: ");

scanf("%f",&x);

printf("ENTER THE LIMIT UPTO WHICH YOU WANT TO EXPAND THE SERIES: ");

scanf("%d",&n);

 deg=x;

x=x*3.14159/180;

 for(i=1;i<=n;i++)

{

 t=t*(-1)*x*x/(2*i*(2*i-1));

sum=sum+t;

} 

 printf(" \nTHE VALUE OF Cos(%f) IS : %.4f\n", deg, sum);

}