- #1
Gladbo
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Hi. I am trying to integrate the function exp(a*cos(x)) from zero to infinit, where a is a constant. First I've rewritten it to Bessel functions of the first kind like this:
exp(z*cos(x))=BesselI(0,z)+sum(BesselI(v,z)*cos(v*x),v=1..infinit)
where BesselI is the modified Bessel function of the first kind. The last term is the sum over v from 1 to infinit and v is an integer. Is this correct?
Secondly I am trying to get Maple to do the integral using the modified Bessel functions, but I can't get it to work. Can anybody help me? Thank you for your time.
Best regards
Anne
exp(z*cos(x))=BesselI(0,z)+sum(BesselI(v,z)*cos(v*x),v=1..infinit)
where BesselI is the modified Bessel function of the first kind. The last term is the sum over v from 1 to infinit and v is an integer. Is this correct?
Secondly I am trying to get Maple to do the integral using the modified Bessel functions, but I can't get it to work. Can anybody help me? Thank you for your time.
Best regards
Anne