UPSC NDA 2 2019 Mathematics Solved Paper

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Question : 50 of 120

Marks: +1, -0

If

→

a

and

→

b

are unit vectors and θ is the angle between them, then what is sin2(

θ

2

) equal to ?

[NDA II 2019]

|a+b|2
4
|a−b|2
4
|a+b|2
2
|a−b|2
2

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