Calculus
posted by Kelly .
Write this expression as a single logarithm
6ln(x+8)+1/8lnxln(cosx)

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