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WBJEE 2019 Math Solved Paper

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Question : 55 of 75
 
Marks: +1, -0
Let
^
α
 ,
^
β
 ,
^
γ
 be three unit vectors such that
^
α
 × (
^
β
×
^
γ
) =
1
2
(
^
β
×
^
γ
) where
^
α
 × (
^
β
×
^
γ
) = (
^
α
 .
^
γ
 )
^
β
 – (
^
α
 .
^
β
 )
^
γ
 If
^
β
 is not parallel to
^
γ
 , then the angle between
^
α
 and
^
β
 is
Validate
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