MHT CET 2024 Mathematics question

Mathematics Vector Algebra MHT CET 2024

If and , then the value of is

(A)5
(B)3
(C)-5Correct
(D)-3

Answer: (C)

Solution

Use . Both are unit vectors and . So \hat\hat\hat\hat\hat\hat\hat\hat\hat\hat$

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Question ID VK-096717