Question

Write this expression as a single logarithm


6ln(x+8)+1/8lnx-ln(cosx)

Answer 1

Use the product rule,
ln(a)+ln(b) = ln(ab)
ln(a)-ln(b) = ln(a/b)

Work out the problem and post your answer for a check if you wish.

Answer 2

Also, see Reiny's answer to your previous post.
http://www.jiskha.com/display.cgi?id=1277479844