9.
\begin{figure}[h]
\includegraphics[alt={},max width=\textwidth]{6c320b71-8793-461a-a078-e4f64c144a3a-28_784_1324_260_312}
\captionsetup{labelformat=empty}
\caption{Figure 4}
\end{figure}
Figure 4 shows part of the curve with equation
$$y = A \cos ( x - 30 ) ^ { \circ }$$
where \(A\) is a constant.
The point \(P\) is a minimum point on the curve and has coordinates \(( 30 , - 3 )\) as shown in Figure 4.
- Write down the value of \(A\).
The point \(Q\) is shown in Figure 4 and is a maximum point.
- Find the coordinates of \(Q\).