/*Calculate Sum of Series:
Sum=1-x2/2! +x4/4!-x6/6!+x8/8!-x10/10! (x2 means : x power 2)
*/

include

include

main()
{
int counter,f_coun;
float sum=0,x,power,fact;

printf("\tEQUATION SERIES : 1- X^2/2! + X^4/4! - X^6/6! + X^8/8! - X^10/10!");

printf("\n\tENTER VALUE OF X : ");
scanf("%f",&x);

for(counter=0, power=0; power<=10; counter++,power=power+2)
{
    fact=1;
    //Factorial of POWER value.
    for(f_coun=power; f_coun>=1; f_coun--)
        fact *= f_coun;
    //The main equation for sum of series is...
    sum=sum+(pow(-1,counter)*(pow(x,power)/fact));
}

printf("SUM : %f",sum);

}