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hati. hatj = hatj .hatk = hatk .hati = 0...

`hati. hatj = hatj .hatk = hatk .hati = 0` because

A

`hati, hatj and hatk` are vector quantities having different magnitudes

B

`hati , hatj and hatk` are unit vectrs but not perpendicular to each other

C

`hati, hatj and hatk` are unit vectors and perpendicular to each other

D

`hati, hatj and hat k` are unit vectors and parallel to each other

Text Solution

Verified by Experts

The correct Answer is:
C
`vec A. vec B =0` when `vec A bot vec B`
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