If A=[[cos theta,-sin theta],[sin theta,...

If A=`[[cos theta,-sin theta],[sin theta,cos theta]]` ,then Adj A is
(a) `[[cos theta,-sin theta],[cos theta,sin theta]]` (b) `[[1,0],[0,1]]` (c) `[[cos theta,sin theta],[-sin theta,cos theta]]` (d) `[[-1,0],[0,-1]]`

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