Differentiate with respect to x. Using the basic differentiation rules for elementary functions, how do I approach this? What can be defined as u? Is it or ?
Last edited by VonNemo19; Jun 21st 2009 at 09:58 AM.
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Originally Posted by VonNemo19 Differentiate with respect to x. Using the basic differentiation rules for elementary functions, how do I approach this? What can be defined as u? Is it or ? Logarithmic differentiation will do here. Now implicitly differentiate, then isolate I hope this helps.
That's what I thought, but I've never applied logs to trig functions before, so i was hesitant. Thanx. Difeerentiating y=3xlncosx Is this correct?
Originally Posted by VonNemo19 That's what I thought, but I've never applied logs to trig functions before, so i was hesitant. Thanx. Difeerentiating y=3xlncosx Is this correct? No. I have marked in red what is uncorrect.
Originally Posted by running-gag No. I have marked in red what is uncorrect. Duh! Unbelievable. Thanx
Let u = cos(x) and v = 3x then differentiate by using the chain rule for functions of more than one variable
Last edited by Random Variable; Jun 21st 2009 at 12:08 PM.
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