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vec OA and vec BO are two vectors of mag...

`vec OA` and `vec BO` are two vectors of magnitudes 5 and 6 respectively.If `angle (BOA) = 60^(@)`, then `vec (OA) `.`vec(OB)` is equal to

A

0

B

15

C

`-15`

D

`15 sqrt3`

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The correct Answer is:
B
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