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If veca, vecb are the unit vectors such ...

If `veca, vecb` are the unit vectors such that `veca + 2vecb + 2vecc=0`, then `|veca xx vecc|` is equal to:

A

`1/4`

B

`sqrt(15)/16`

C

`15/16`

D

`sqrt(15)/4`

Text Solution

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The correct Answer is:
D
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