Need to find integral of a bessel function. It gives Warning: Explicit integral could not be found on running the program, please help.

f=3.74;

c= 3*10^8;

a= 17*10^(-3);

W= 2*a;

L= 2*a;

K1= (2*pi*f)/c;

syms x;

F1= ((sin((K1.*W.*cos(x))./(2))).^2.*(sin(x)).^3)./((cos(x)).^2)

G1= (1/(120.*(pi).^2)).*int(F1,x,0,pi)

T1= double(G1)

FF1= K1.*L.*sin(x)

BF1= (besselj(0,FF1));

G12= (1/(120.*(pi).^2)).*int((((sin((K1.*W.*cos(x))./(2))).^2.*((sin(x)).^3).*(BF1)./((cos(x)).^2))),x,0,pi)

T12= double(G12)