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If theta is the acute angle between any ...

If `theta` is the acute angle between any two vectors `" "``veca" and "vecb`, then
`|veca.vecb|=|vecaxxvecb|` when `theta ` is equal to :

A

0

B

`pi/4`

C

`pi/2`

D

`pi`

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The correct Answer is:
B
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