Math miscellaneousHard
Question
If
be such that
If the projection
along
is equal to that of
along
and
are perpendicular to each other then
equals
be such that
If the projection
along
is equal to that of
along
and
are perpendicular to each other then
equalsOptions
A.2
B.√7
C.√14
D.14
Solution
Projection of
along
and
along
is
and
respectively
According to question
⇒ 

along
and
along
is
and
respectivelyAccording to question
⇒ 

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