(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

question asks:

lim(x,y) -> (0,0)

cos(xy) -1 / [x^2 y^2]

2. Relevant equations

3. The attempt at a solution

if you multiply the top and bottom by cos(xy) + 1 you get

-[sin^2(xy)/(xy)^2] * [1/cos(xy) + 1]

but in the solution they somehow got rid of the denominator (xy)^2, because if that's there the denominator is still 0. How do you get rid of that?

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# Homework Help: Help with a limit.

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