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If a,b,c are non- coplaner unit vectors ...

If a,b,c are non- coplaner unit vectors such that `a xx (b xx c)= (b+c)/(sqrt(2))`, then the angle between a and b is

A

A `pi/6`

B

B `pi/4`

C

C `pi/2`

D

D `(3pi)/(4)`

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The correct Answer is:
D
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