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if A= [{:(costheta,sintheta),(-sintheta,...

`if A= [{:(costheta,sintheta),(-sintheta,costheta):}],` then `A A^T`=?`

A

`[{:(1,0),(0,1):}]`

B

`[{:(0,1),(1,0):}]`

C

`[{:(1,0),(0,-1):}]`

D

None of these

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A
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