- #1

crm08

- 28

- 0

## Homework Statement

[tex]\int\frac{dx}{9x^{2}+1}[/tex]

## Homework Equations

[tex]\frac{d}{dx}(arctan(x)) [/tex] = [tex]\frac{1}{1+x^{2}}[/tex]

## The Attempt at a Solution

The other problems in this homework set all use the substitution rule but I can't find anything that would simplify the problem, my other guess would be to pull a (1/9) out, but then that would result in having a denominator = (x^2 + (1/9)), could someone get me on the right track, I have a feeling that I'm overlooking something obvious