How does one go about differentiating x^cos(x) ? tried doing it using chain rule. not sure though.
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Originally Posted by pseizure2000 How does one go about differentiating x^cos(x) ? tried doing it using chain rule. not sure though. Let Then Now take the derivative: So and we know what y is so, -Dan
Last edited by topsquark; October 19th 2007 at 12:24 PM. Reason: Oopsies!
why is it negative x^cos(x) in the final answer?
Originally Posted by pseizure2000 why is it negative x^cos(x) in the final answer? It isn't negative. When I typed it in the first time I had factored the negative out, but on second thought I decided not to. I evidently forgot to erase the negative sign in the final answer. Sorry! (I have fixed the problem in the original post.) -Dan
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