[" If "[[1,-tan theta],[tan theta,1]][[1...

[" If "[[1,-tan theta],[tan theta,1]][[1,tan theta],[-tan theta,1]]^(-1)=[[a,-b],[b,a]]," then "],[[" (A) "a=cos2 theta,b=sin2 theta," (B) "a=sin2 theta,b=cos2 theta],[" (C) "a=cos2b,b=1," (D) none of these "]]

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[" If "[[1,-tan theta],[tan theta,1]][[1,tan theta],[-tan theta,1]]^(-1)=[[a,-b],[b,a]]," then "],[[" (A) "a=cos2 theta,b=sin2 theta," (B) "a=sin2 theta,b=cos2 theta],[" (C) "a=cos2b,b=1," (D) none of these "]]

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