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If P is a two-rowed matrix satisfying P'...

If P is a two-rowed matrix satisfying `P' = P^(-1)`, then P can be

A

`[{:(cos theta,-sin theta),(-sin theta, cos theta):}]`

B

`[{:(cos theta, sin theta),(-sin theta,cos theta):}]`

C

`[{:(-cos theta,sin theta),(sin theta,-cos theta):}]`

D

none of these

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The correct Answer is:
B
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