8
\includegraphics[max width=\textwidth, alt={}, center]{13cfb59a-7781-4786-a625-919b01a2a4f0-3_716_437_1137_854}
The diagram shows a parallelogram \(O A B C\) in which
$$\overrightarrow { O A } = \left( \begin{array} { r }
3
3
- 4
\end{array} \right) \quad \text { and } \quad \overrightarrow { O B } = \left( \begin{array} { l }
5
0
2
\end{array} \right)$$
- Use a scalar product to find angle \(B O C\).
- Find a vector which has magnitude 35 and is parallel to the vector \(\overrightarrow { O C }\).