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[([1,-tan theta],[tan theta,1])([1,tan t...

[([1,-tan theta],[tan theta,1])([1,tan theta],[-tan theta,1])^(-1)=[[a,-b],[b,a]]" then "],[[" A) "a=b=1," B) "a=cos2 theta,b=sin2 theta],[" C) "a=sin2 theta,b=cos2 theta," D) "a=1,b=sin2 theta]]

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