11D-18.-Prog Write a program to compute Cosine series i.e.

18.   Write a program to compute Cosine series i.e.
Cos(x)= 1 – x2/2! + x4/4! – x6/6! + …xn/n!
Algorithm:
Input
1. x   //x=2
2. n  //n=3
Output
1. cx    // cosine series
Method:
1. start
2. Read x
3. Read n
4. //logic
cx=1;
j=2;
for(i=2;i<=n;i++)
begin
     fact=1;
     for(k=j;k>=1;k--)
   begin
      fact=fact*k
   end
    if(i%2==0)
    {
      cx=cx-pow(x,j)/fact;
    }
    else
    {
       cx=cx+pow(x,j)/fact;
     }
   j=j+2;
end
loop end
5.print cx
6.stop