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If A=[(cos alpha, -sinalpha),(sin alpha,...

If `A=[(cos alpha, -sinalpha),(sin alpha, cos alpha)]`, then `A+A^(T)=I`, if the vlaue of `alpha` is

A

`(pi)/(6)`

B

`(pi)/(3)`

C

`pi`

D

`(3pi)/(2)`

Text Solution

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The correct Answer is:
B
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