Yup, that's correct !
As for the codes :
\ln gives instead of . Same for \cos
Sidenote : that's very good, you put the parenthesis where they needed to be !
Express the given quantity as a single logarithm.
and now for my attempt
oh, BTW, sqrt = square root. I dont know how to make the symbol on this forum.
man, I wish I could make this look nicer so its easier to read. But anyway, that last entry is what I got. I just want to be sure.