The given limit is $$ \lim_{(x,y) \to (0,0)} \frac{xy^2 \cos(y)}{3x^2 + y^4} $$.
This is a limit of a rational function as (x,y) approaches (0,0). If we substitute (0,0) directly, we get 0/0, which is an indeterminate form. This means we need to investigate
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