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The angle between two vectors vecA=vecB ...

The angle between two vectors `vecA=vecB` is `theta`. The resultant of `vecA and vecB` making an angle `(theta)/(2)` with `vecA`. Then:

A

`A=B`

B

`AB=1`

C

`A=2B`

D

`A=(B)/(2)`.

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The correct Answer is:
A
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