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If A=[{:(cos theta,sin theta),(-sin thet...

If `A=[{:(cos theta,sin theta),(-sin theta,cos theta):}]`, then what is `A^(3)` equal to ?

A

`[{:(cos 3theta,sin 3theta),(-sin 3theta,cos 3theta):}]`

B

`[{:(cos^(3) theta,sin^(3) theta),(-sin^(3) theta,cos^(3) theta):}]`

C

`[{:(cos 3 theta,-sin3 theta),(-sin3 theta,cos theta):}]`

D

`[{:(cos^(3) theta,sin^(3) theta),(-sin^(3) theta,cos^(3) theta):}]`

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