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If I=[(1 ,0),( 0, 1)] , J=[(0, 1),(-1 ,...

If `I=[(1 ,0),( 0, 1)]` , `J=[(0, 1),(-1 ,0)]` and `B=[(costheta,sintheta),(-sintheta,costheta)]` , then `B` equals a) `Icostheta+Jsintheta` (b) `Isintheta+Jcostheta` (c) `Icostheta-Jsintheta` (d) ` Icostheta+Jsintheta`

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