Q10 of 93 Page 25

Mark the correct alternative in each of the following:

If are unit vectors, then


are unit vectors and angle between each of them is 90°


So,


So (A) is false ∵


Option (B) is true because angle between them is 0°


So, cosQ=cos0=1


∵


(C) False as


(D) is False as


And then


(B)

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