UPSEE 2019 Solved Paper

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Question : 134 of 150

Marks: +1, -0

Let a=−

^

i

+

^

j

and b=

^

i

+3

^

j

. Then, angle between the vectors 4a+b and

1

4

(7b−a) is

30°
45°
60°
90°

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