# Math Help - Integrate

1. ## Integrate

using u-substitution

$
\int {\frac{{\tan (x)}}
{{\ln (sin(x))}}} dx

$

thanks!

2. What function is represented by "sen(x)"? I'm not familiar with this notation...?

3. Originally Posted by mms
using u-substitution

$
\int {\frac{{\tan (x)}}
{{\ln (sin(x))}}} dx

$

thanks!
This integral has no closed form. If $\sin x$ was $\cos x$ or if $\tan x$ was $\cot x$, then it would be. Is it possible that there's a typo in the problem?

4. Originally Posted by redsoxfan325

This is not integrable.
don't abuse of the language! we should say "no closed form, no primitive."

5. OK.