Three vectors overset rarr A = a hat i...

Three vectors ` overset rarr A = a hat i + hat j + hat k , overset rarr B = hat i + b hat j + hat k` and `overset rarr C = hat i + hat j + c hat k` are mutually perpendicular .The respective values of a,b and c are

A

0,0,0

B

`- 1/2 , - 1/2 , - 1/2`

C

1,-1,1`

D

`1/2 , 1/2 , 1/2`.

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