VectorHard
Question
Let
and
be non-zero vectors such that
If θ is the acute angle between the vectors
and
, then sin θ equals
and
be non-zero vectors such that
If θ is the acute angle between the vectors
and
, then sin θ equalsOptions
A.

B.

C.

D.

Solution
⇒ 
⇒

⇒
= 0 ⇒ cos θ = - 1/3 ⇒ sin θ = 
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