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

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

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

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

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

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

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

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

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

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

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

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