Write a program to compute the cosine of x. The user should supply x and a positive integer n. We compute the cosine of x using the series and the computation should use all terms in the series up through the term involving xn

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Assignments » Flow Of Control » Set 3 » Solution  3

Source Code: 

#include<iostream>

using namespace std;



int main()

{

 int i,j,n,fact,sign=-1;

 float x, p,sum=0;

 cout<<"Enter the value of x : ";

 cin>>x;

 cout<<"Enter the value of n : ";

 cin>>n;



 for(i=2;i<=n;i+=2)

 {
                p=1
  fact=1;

  for(j=1;j<=i;j++)

  {

   p=p*x;

   fact=fact*j;

  }

  sum+=sign*p/fact;

  sign=-1*sign;

 }

 cout<<"cos "<<x<<"="<<1+sum;





 return 0;


}

  The Output Is:  


Enter the value of x : 1
Enter the value of n : 5
cos 1 = 0.541667