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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?

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# Homework Help: An indefinite integral

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