\end{array}\right]\), then for what value of α, A is an identity matrix?
A. 0
B. \(\frac{\pi}{2}\)
C. π
D. \(\frac{\pi}{4}\)
Answer:A
\end{array}\right]\), then for what value of α, A is an identity matrix?
A. 0 B. \(\frac{\pi}{2}\) C. π D. \(\frac{\pi}{4}\)