JEE Mains Model Paper 11

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Question : 62 of 90

Marks: +1, -0

Let

−

a

,

−

b

and

−

c

be three unit vectors such that

−

a

×(

−

b

×

−

c

) =

√3

2

(

−

b

+

−

c

). If

−

b

is not parallel to

−

c

, then the angle between

−

a

and

−

b

5π
6
3π
4
π
2
2π
3

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