Question

Find the Limit!

Answer 1

\[\lim_{(x,y) \rightarrow (2,0)} (1-cosy)/xy^2\]

Answer 2

the hint was to use cos^2t+sin^2t=1;

I tried doing this but I'm just stuck until this part
\[\lim_{(x,y) \rightarrow (2,0)} \sin^2y/xy^2(1+cosy)\]