यदि A=[(cosalpha,-sinalpha),(sinalpha,co...

यदि `A=[(cosalpha,-sinalpha),(sinalpha,cosalpha)]` तो A + A = I, यदि `alpha` का मान है

A

`(pi)/(6)`

B

`(pi)/(3)`

C

`pi`

D

`(3pi)/(2)`

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The correct Answer is:

B

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