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If vec(A) + vec(B) = vec(C ) and A + B =...

If `vec(A) + vec(B) = vec(C )` and `A + B = C`, then the angle between `vec(A)` and `vec(B)` is :

A

0

B

`(pi)/(4)`

C

`(pi)/(2)`

D

`pi`

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The correct Answer is:
A
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