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If A=1/3{:[(1,2,2),(2,1,-2),(a,2,b)]:} i...

If `A=1/3{:[(1,2,2),(2,1,-2),(a,2,b)]:}` is an orthogonal matrix, then

A

a=1 , b=2

B

a=-2 , b=1

C

a=3 , b=- 1

D

a=- 2 , b =-1

Text Solution

Verified by Experts

The correct Answer is:
D
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