If ((1,-tan theta ),(tan theta,1))((1,ta...

If `((1,-tan theta ),(tan theta,1))((1,tan theta ),(-tan theta ,1))^(-1) = ((a,-b),(b,a))` then :

A

a=1,b=1

B

`a=cos 2theta,b=sin 2 theta`

C

`a=sin2theta,b=cos 2theta`

D

a=1,b=0

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The correct Answer is:

B

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