I don't really understand how to derive taylor polymomials for questions like these for example

find the 3rd degree taylor polymomial about the origin of

f(x,y) = (cos y) ln(xy+1)

can someone please help and explain what the starting steps are

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- October 21st 2011, 02:04 PMKumataylor polynomial help!
I don't really understand how to derive taylor polymomials for questions like these for example

find the 3rd degree taylor polymomial about the origin of

f(x,y) = (cos y) ln(xy+1)

can someone please help and explain what the starting steps are - October 21st 2011, 02:35 PMSammySRe: taylor polynomial help!
- October 21st 2011, 02:40 PMKumaRe: taylor polynomial help!
yes. Do I just substitute the terms of the question into the taylor series of cos x and ln 1+x?

I was looking over some examples and that is what my instructor did. But what about a question like

cos(xy)/[1 + y^2]

there isn't a standard representation for the denominator. - October 21st 2011, 02:46 PMCaptainBlackRe: taylor polynomial help!