The question is find dy/dx of .

which I rewrote as

then, using the chain rule, .

But the book gives the answer .

Is my answer wrong? Or do I just need to simplify it further?

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- October 10th 2007, 05:10 PMHappyChain Rule Derivative
The question is find dy/dx of .

which I rewrote as

then, using the chain rule, .

But the book gives the answer .

Is my answer wrong? Or do I just need to simplify it further? - October 10th 2007, 05:46 PMHappy
Never mind, I've got a new answer that is right, and I checked it by graphing both my new equation and the equation the books gives w/ my TI-89 and the graphs are identical.

Now, the real derivative I got is .

Now I just need to convert this into the equation the book wants, which is .

I'm guessing its a random trig identity...but can't find which one(Doh) - October 10th 2007, 06:11 PMJhevon
- October 10th 2007, 09:04 PMHappy
Ah, I see. Thank you for your help. (Handshake)