Vector Algebra Part 2

Section: Mathematics

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Question : 91 of 100

Marks: +1, -0

Let

^

a

and

^

b

be two unit vectors such that the angle between them is ‌

π

4

. If θ is the angle between the vectors (

^

a

+

^

b

) and (

^

a

+2

^

b

+2(

^

a

×

^

b

)), then the value of 164cos2θ is equal to :

[29-Jul-2022-Shift-1]

90+27√2
45+18√2
90+3√2
54+90√2

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