Persiapan Ulangan 2

Jawab: (1) dan (5)

\begin{equation*}
\begin{split}
\frac {\cancel{a}}{\sin A} & = 2\cancel {R} \\\\
\frac {1}{\sin A} & = 2 \\\\
\sin A & = \frac 12 \\\\
A & = 30^{\text{o}} \text{ atau } 150^{\text{o}}
\end{split}
\end{equation*}