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Study23 Group TitleBest ResponseYou've already chosen the best response.0
\(\ \Large f(\theta)=ln(cos\theta) ??\)
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.1
ln(x) its derivative is (1/x)d/dx(x)
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.1
do the same with cosx
 one year ago

Study23 Group TitleBest ResponseYou've already chosen the best response.0
So use the Chain Rule?
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.1
hmm not so let me draw for u.
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.1
dw:1353048499720:dw when u have to take derivatives of log functions this is formula u have to remember
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.1
dw:1353048585263:dw
 one year ago

Study23 Group TitleBest ResponseYou've already chosen the best response.0
So: dw:1353048624893:dw Or do I insert ln(cosx)?
 one year ago

malical Group TitleBest ResponseYou've already chosen the best response.1
So use the chain rule.
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.1
no just cos x
 one year ago

Study23 Group TitleBest ResponseYou've already chosen the best response.0
@malical after this step?
 one year ago

malical Group TitleBest ResponseYou've already chosen the best response.1
Yes. Nubeer said no but his drawing said yes. That d/dx is taking another derivative of just cosx.
 one year ago

Study23 Group TitleBest ResponseYou've already chosen the best response.0
Oh okay, that's what I was thinking! Thanks for the help guys!
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.1
yeah my bad.. sorry.
 one year ago

Study23 Group TitleBest ResponseYou've already chosen the best response.0
That's okay @nubeer. I'm appreciate that you tried to help! ;)
 one year ago
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