#include "stdafx.h" 
#include "math.h" 
#include <iostream> 
using namespace std; 
 
double sin_our (double x, double eps) 
{  
	double func=x; 
	double a = x; 
       double q=100.0;
	int i=3; 
	int m=1; 
	 
	while( abs(func-q) >= eps) 
	{  q=func;
		m++; 
	       i++;
	 a*=x*x; 
	 func+=pow(-1,m-1)*a/i; 
	} 
	return func; 
} 
 
void main() 
{   
   double x, eps; 
   cin>>x; 
   cin>>eps; 

  if ((x>=-1) && (x<=1)) cout<<atan(x)<<'\t'<<sin_our(x,eps); 

  else cout<<"otstan Guzhov"; 
}