  
 Retangular Rule :    
 
    0.  
 
 Trapezoidal Rule :    
 
    0.218090  
 
 Simpson's Rule :    
 
    0.262662  
 
 Simpson's 3/8 Rule :    
 
    0.262553  
 
 The exact value of intergation is :   
 
    0.262467  
 
 thus corresponding errors are :    
 
    0.262467  
    0.044378  
  - 0.000194  
  - 0.000086  