Q. 17

Mark (√) against A.

B.

C.

D. none of these

Answer :

Given and are unit vectors


Let θ be the angle between them.


Asking us to find the value of


Let this value de T


T=


Squaring on both the sides


T2 =


T2=


T2=


T2=


T2=


T2=


T2=


can be written as


T2=


= T2=


T2=


T=

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