post 27

i'm doing my second post for over the holiday's now because i'm going to be in disney world at national danceteam competition :) everyone wish us luck! but anyways, i'm doing it now because i would probably forget about doing it sunday.
alright, so this is just going to be a continuation of post 26, i'm just gonna go over all the helpful stuff that b rob went over with us on tuesday & wednesday.

chain rule :
this helped me a lot actually. so pretty much the rule is work from the outside in, and whenever there is nothing left, that is when you STOP. don't keep differentiating.
example:
cos^2(3x + 2)
ok so remember, work from the outside to the inside. the biggest thing here, is the EXPONENT. so, cos^2(3x + 2) = 2cos(3x + 2),
then the next biggest thing is the trig function. so 2cos(3x + 2) = 2-sin(3x + 2)
after that, you deal with the last thing.. whatever is in paranthesis. 2-sin(3x + 2) = -2sin(3x + 2) times (3)
so your final answer would be -6sin(3x + 2).