NDA Math Vector Algebra

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Question : 4 of 101
 
Marks: +1, -0
The position vectors of vertices A,B and C of triangle ABC are respectively
∧
j
+
∧
k
,3
∧
i
+
∧
j
+5
∧
k
and 3
∧
j
+3
∧
k
. What is angle C equal to ?
[NDA II 2022]
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