Posted by **Emily** on Wednesday, February 22, 2012 at 5:11pm.

Find the derivative of y = ln |cos(ln)|.

I got -tan(ln x)/x, is this correct?

- Calculus -
**Reiny**, Wednesday, February 22, 2012 at 5:17pm
Is that a typo ?

Should it say: y = ln |cos(ln x) | ?

If so, then you are correct, good job.

- Calculus -
**Emily**, Wednesday, February 22, 2012 at 6:17pm
Ahh yes that was a typo! Thank you!!

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