Hi,(adsbygoogle = window.adsbygoogle || []).push({});

Looking to integrate the indefinite integral:

[tex]\int tan~x\cdot ln~x\cdot cos~x[/tex]

Since tan x = sin x/ cos x, this integral be written as [tex]\int sin~x\cdot ln~x[/tex]

In that case i thought the answer was cot x. But that is wrong.

Do you need to use integration by parts on this one?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# An indefinite integral

**Physics Forums | Science Articles, Homework Help, Discussion**