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JEEMAIN and NEET
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JEEMAIN PAST PAPERS
>>
2006
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Q)
The value of
a
, for which the points A, B, C with position vectors
2
ˆ
i
−
ˆ
j
+
ˆ
k
,
ˆ
i
−
3
ˆ
j
−
5
ˆ
k
and
a
ˆ
i
−
3
ˆ
j
−
ˆ
k
respectively are the vertices of a right angled triangle with
C
=
π
2
are :
( A ) 2 and 1
( B ) -2 and -1
( C ) 2 and -1
( D ) -2 and 1
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