- #1
utkarshakash
Gold Member
- 854
- 13
Homework Statement
$$ \displaystyle \int_0^{\infty} e^{-x} \dfrac{a\sin ax - \cos ax}{1+a^2} da $$
Homework Equations
The Attempt at a Solution
Evaluating this using integration by parts will be a cumbersome process and I don't even think that would give me the answer. Substitutions aren't going to make this problem easier. What other methods should I apply?