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NDA Math Vector Algebra

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Question : 14 of 101
 
Marks: +1, -0
If
→
a
+3
→
b
=3
∧
i
−
∧
j
 and 2
→
a
+
→
b
=
∧
i
−2
∧
j
, then what is the angle between
→
a
 and
→
b
 ?
[NDA-II 2021]
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