Question

Two vectors A = 3i + aj + 3k and B = 3i - j - k are
perpendicular to each other. Calculate the value of
constant a.

Answer 1

Answer:

hey!

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Explanation:

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If they are perpendicular then dot product should be 0 so A.B=0  

AxBx +AyBy +AzBz =0

Ans =6

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thanks!