what is the angle between (overset(rarr)...

what is the angle between `(overset(rarr)P+overset(rarr)Q)` and `(overset(rarr)P+overset(rarr)Q)`?

A

0

B

`(pi)/(2)`

C

`(pi)/(2)`

D

`pi`

Verified by Experts

The correct Answer is:

b

before `barA xx barB =-bar B xx barA`

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