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Let bara and barb be two unit vectors, a...

Let `bara` and `barb` be two unit vectors, and `alpha` be the angle between them.
Then `bara + barb` is a unit vector, if `alpha=`

A

`(pi)/4`

B

`(pi)/3`

C

`(2pi)/3`

D

`(pi)/2`

Text Solution

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The correct Answer is:
C
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MARVEL PUBLICATION-VECTORS-TEST YOUR GRASP
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