//Program to display the Cosine Series of a Number 

#include<stdio.h>
#include<conio.h>
void main()
{
	int n;
	float x,term,sum;
	clrscr();
	printf("Enter the value of x:");
	scanf("%f",&x);
	x=x*3.14/180;
	term=sum=1;
	n=2;
	while(n<100)
	{
		term=(term*x*x*-1)/(n*(n-1));
		sum=sum+term;
		n=n+2;
	}
	printf("Sum=%f\n",sum);
	getch();
}
/*
OUTPUT
Enter the value of x : 7
Sum = 0.992554

*/