# Difficult Integral

1. Dec 18, 2009

### Rats_N_Cats

1. The problem statement, all variables and given/known data

I'm stuck with this definite integral : $$\int_0^1\frac{ln(1+x)}{1+x^{2}} dx$$

2. Relevant equations

The various "standard integrals".

3. The attempt at a solution

I just don't know where to start, or how to do it. I tried various substitutions but none of them worked; I also tired doing it by parts but that didn't work either.

Last edited: Dec 18, 2009
2. Dec 18, 2009

### dirk_mec1

3. Dec 18, 2009

### Rats_N_Cats

Okay, I got that. Thanks.
I knew of the identity, but didn't know I'd have to use it after making a substitution.