please solve this equation

hello friend
can anybody solve this equaton for me. i will be very thankful to you

regards sameer

the answer is 6

thank you friend for you kind help i m really thanks but can you please tell me the procedure how did you solve this.

There is no closed form solution. You have to integrate it numerically.
The function is very smooth between 0 and \pi. so you can use a low order Gaussian quadrature method. But before that, get a basic book on numerical analysis and try to improve your math skills.
BTW the answer is 0.000616871

thanks in ton dear.actually i dont how to integrate the bessel function of zero order
i tried to solve by using matlab but i got the wrong answer but your answer is absolutely right and i use this equation in future also with diffrent value of W and L, thats why iw as asking for the exact procedure or if you know the matlab equation plz tell me

I worked on this

---------- Post added at 15:36 ---------- Previous post was at 15:35 ----------

I am not so sure of answer I got, though I believe it's very close to original answer

---------- Post added at 15:39 ---------- Previous post was at 15:36 ----------

you can solve using matlab functions quad, i believe. it'll be important for somebody to confirm if this answer is correct. but this is what i did
first create a m-file
function y = myfun(x)
y = 759/400*sin(x).*sin(x).*sin(x).*sin(x).*...
sin(621/500*cos(x)).*sin(621/500*cos(x))./cos(x)./cos(x);

then in command window:
format long g
a = quadl(@myfun,0,pi);
a/(120*pi*pi)

Jo is assumed to be constant, so you'll get
0.00268026689121845*Jo

thank you friend for making me understan. i have understand everything but in that equation Jo is bessel function not the contast bessel function of 0 order. that also have to be integrate

hello again
i need help again
i dont know how to make the program for the equations having summation

plz somebody make the program for give equation i will be verythnk ful to you