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If any vector vec a xx (vec b xx vec c)...

If any vector `vec a xx (vec b xx vec c) + vec b xx (vec c xx vec a) + vec c xx (vec a xx vec b) =`

A

0

B

`3 vec a`

C

`2 vec a`

D

`vec a`

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The correct Answer is:
C
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HIMALAYA PUBLICATION-VECTORS AND THEIR APPLICATIONS-QUESTION BANK
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