Question
Calculate each limit in Exercises.$$\lim _{x \rightarrow 0} 3 x^{2} \cot ^{2} x$$
Step 1
We can rewrite $\cot ^{2} x$ as $\frac{\cos ^{2} x}{\sin ^{2} x}$, so the function becomes $3x^{2} \frac{\cos ^{2} x}{\sin ^{2} x}$. Show more…
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