Question

anyone can help me i will give medals and ill be your fan

Answer 1

hint:
\[\begin{gathered}
- 64 = 64 \times \left( { - 1} \right) = {2^6}\left\{ {\cos \left( {\pi + 2k\pi } \right) + i\sin \left( {\pi + 2k\pi } \right)} \right\} \hfill \\
k \in \mathbb{Z} \hfill \\
\end{gathered} \]