Limit Trigonometri Bentuk Dasar

\begin{equation*}
\begin{split}
& \lim_{x\rightarrow 0}\frac{\sin4x \: \tan5x}{10 \: x^2} \\\\
& \lim_{x\rightarrow 0} \frac {\sin4x}{10x} \:.\: \frac {\tan 5x}{x} \\\\
& \frac {4}{10} \:.\: 5 \\\\
& 2
\end{split}
\end{equation*}