1 + x2/2! + x4/4! + x6/6!
+ …….xn/n!
CODE : :
#include <stdio.h>
#include <math.h>
long long fact(int n);
int main ()
{
long long i,x,n;
double sum=1;
printf("Enter x and n: ");
scanf("%lld %lld",&x,&n);
for(i=2;i<=n;i=i+2)
{
sum=sum+pow(x,i)/(double)fact(i);
}
printf("Sum is : %.3lf\n",sum);
}
long long fact(int n)
{
if(n==1)
return 1;
return n*fact(n-1);
}
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