Question Id : 12228 |
Context : JEE Main 4 September 2020 (Morning)
If $A = \left[ {\matrix{ {\cos \theta } & {i\sin \theta } \cr {i\sin \theta } & {\cos \theta } \cr } } \right]$, $\left( {\theta = {\pi \over {24}}} \right)$
and ${A^5} = \left[ {\matrix{ a & b \cr c & d \cr } } \right]$, where $i = \sqrt { - 1} $ then which one of the following isnot true?
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4