Unable to integrate a function using integral and vpaintegral

Hi,

I am trying to integrate the function from [0 inf]. I have used integral and vpaintegral nonetheless it gives a NaN.

theta = 6.3 *pi/180;

f = @(x) 1+cosh(2.*theta.*x)./sinh(2*pi.*x) .* tanh ((pi - theta).*x) ;

m = integral(f, 0, inf);

Answer 1

[Torsten]

syms x
theta = 6.3*pi/180;
f = (1+cosh(2*theta*x))/sinh(2*pi*x)*tanh((pi-theta)*x);
vpaintegral(f,x,0,Inf)

ans = 

0.310368