VectorHard
Question
are there non coplanar unit vectors. 
is inclined at an angle α to the plane of 
and 
and 
are equally inclined at an angle β to 
. The vector 
is equal to -Options
A.
sin2 α cos β 
sin2 α cos β B.sin2 β cos α
sin2 β cos α C.2 α sin2β 
2 α sin2β D.sin2 α sin β 
sin2 α sin β Solution
= (sin α sin β)
cross product = (sin α sin β)
= (sin α sin β)
=
(sin α sin2β) = (sin α sin β)cross product = (sin α sin β)
= (sin α sin β)
=
(sin α sin2β) 
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