I am trying to integrate a function numerically, but Maple doesn't give an answer:

restart;

ko:=2*Pi/v*f;v:=2.998*10^8;f:=2.525*10^9;

Lo:=29.379;Wo:=34.477;

evalf(eval(1/(120*Pi^2)*Int((sin(ko*W/2*cos(theta))/cos(theta))^2*sin(theta)^3*BesselJ(0,ko*L*sin(theta)),theta=0..Pi),[L=Lo,W=Wo]));

I have Maple 12.

Thanks for your comments in advance.

Hello!

I have just found this incorrect behaviour of is  (Maple 12):

restart;

Hello!

The command coulditbe works incorrectly with abs:

restart;

coulditbe(t,infinity);

                                 true
 It is OK.

Hello,

I get an error message when I evaluate this line:

piecewise(And(And(abs(a)<infinity,a<>0),And(abs(b)<infinity,b<>0)),1,0);

Error, (in PDEtools/sort_as_in) sort: 2nd argument must be a function that always returns true or false

I don't know what the problem is with this line. I have Maple 12.

Have you got any idea?

I thought before that &where is not  a keyword, but I don't understand the difference here (I found &where in the solutions of pdes):

restart;
f1:=a &where b;
op(2,f1);

it gives me {b}

f2:=a &something b;
op(2,f2);
 

gives me simply b

I don't find any information on &where in the help.