Dear Doug,

        I find something not to understand,you said that

                            "x:=Int(sqrt(1-(6*Pi/(1.3)*0.06 (R(s)))^(2)-(D(R)(s))^(2)),s=0..1.3);

          /1.3                                                                   
         |                                                                                             (1/2)   
         |     /                                       2         0.2130177514               \       
         |     |1 - 0.07668639050 Pi  - ---------------------------------    |      ds
         |     |                                                                                  2       |        
         /0   |                        /                                                     2\       2|       
                \                        \1 + (7.692307692 s - 3.0)         /  Pi    /       
value( x );
                                0.6365144807                                                              "

       but I  also write" x:=Int(sqrt(1-(6*Pi/(1.3)*0.06 (R(s)))^(2)-(D(R)(s))^(2)),s=0..1.3);" and get the result  as following.

> x := Int(sqrt(1-((6*Pi/(1.3)*0.6e-1)*R(s))^2-(D(R))(s)^2), s = 0 .. 1.3);
   /1.3  
  |     /
  |     |
  |     |1
  |     |
 /0     |
        \

                                                                                                                                        2
                                       2 /0.06 arctan(7.692307692 s - 3.0)                                 \
    - 0.07668639052 Pi  |-------------------------------- -------------+ 0.03000000000| 
                                           \               Pi                                                                         /

                                                                                   \        
                0.2130177514                                        |        
    - ------------------------------------------------            | ^(1/2) ds
                                                         2                       |        
      /                                             2 \    2                    |
      \1 + (7.692307692 s - 3.0) /  Pi                      /                    
 > value(x);
                                   1.296827065

  can you tell me why,and it is very important for me!

          Thank you !

 Liu

Dear Doug,

        I find something not to understand,you said that

                            "x:=Int(sqrt(1-(6*Pi/(1.3)*0.06 (R(s)))^(2)-(D(R)(s))^(2)),s=0..1.3);

          /1.3                                                                   
         |                                                                                             (1/2)   
         |     /                                       2         0.2130177514               \       
         |     |1 - 0.07668639050 Pi  - ---------------------------------    |      ds
         |     |                                                                                  2       |        
         /0   |                        /                                                     2\       2|       
                \                        \1 + (7.692307692 s - 3.0)         /  Pi    /       
value( x );
                                0.6365144807                                                              "

       but I  also write" x:=Int(sqrt(1-(6*Pi/(1.3)*0.06 (R(s)))^(2)-(D(R)(s))^(2)),s=0..1.3);" and get the result  as following.

> x := Int(sqrt(1-((6*Pi/(1.3)*0.6e-1)*R(s))^2-(D(R))(s)^2), s = 0 .. 1.3);
   /1.3  
  |     /
  |     |
  |     |1
  |     |
 /0     |
        \

                                                                                                                                        2
                                       2 /0.06 arctan(7.692307692 s - 3.0)                                 \
    - 0.07668639052 Pi  |-------------------------------- -------------+ 0.03000000000| 
                                           \               Pi                                                                         /

                                                                                   \        
                0.2130177514                                        |        
    - ------------------------------------------------            | ^(1/2) ds
                                                         2                       |        
      /                                             2 \    2                    |
      \1 + (7.692307692 s - 3.0) /  Pi                      /                    
 > value(x);
                                   1.296827065

  can you tell me why,and it is very important for me!

          Thank you !

 Liu

Dear  Doug,

       I am a newer with Maple ,so I have too many things  that I don't know. Thank  you for helping me,Doug Meade.With your help ,I think I can solve my trouble.Thank you again!

                 liu

Dear  Doug,

       I am a newer with Maple ,so I have too many things  that I don't know. Thank  you for helping me,Doug Meade.With your help ,I think I can solve my trouble.Thank you again!

                 liu