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If (hat i, hat j, hat k) are the usual t...

If `(hat i, hat j, hat k)` are the usual three perpendicular unit vectors, then the value of `hat i*( hat j xx hat k)+ hat j*(hat i xx hat k)+ hat k*(hat i xx hat j)` is

A

0

B

`-1`

C

1

D

3

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