UPSC NDA I 2013 Mathematics Paper

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Question : 85 of 120
 
Marks: +1, -0
If θ is the angle between the vectors 4(
∧
i
−
∧
k
)
and
∧
i
+
∧
j
+
∧
k
, then what is (sin‌θ+cos‌θ) equal to?
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