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CUSAT 2022 BTech Solved Paper Shift 1

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Question : 151 of 200
 
Marks: +1, -0
If the position vectors of A,B and C are respectively 2
^
i
−
^
j
+
^
k
,
^
i
−3
^
j
−5
^
k
, and 3
^
i
−4
^
j
−4
^
k
, then cos2A is equal to
Validate
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