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Consider the following for the next two (02) items that follow:Let
=+,=3+4 and
=+,where
is parallel to
and
is perpendicular to
[NDA II 2016]
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Question : 61 of 101
Marks:
+1,
-0
Solution:
Since
is parallel to
=λNow
=+=λ+Comparing we get
z=4,λ+y=0,λ+x=3⇒−y+x=3   (From(1))
⇒λ=−y...(1)
⇒x−y=3....(2)
Now
is
⊥r to
So,
cos‌θ=0⇒x+y=0.....(3)
Solving (2) and (3) we get
2x=3⇒x=,y=−⇒=λ()=(+)
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