Question

27. If vector A=5i +9j - 4k and vector B=2i+2j-ck are perpendicular to each other, then find
the value of c.

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Answer 1

Answer:

Hi there!!!

Explanation:

First you must know that, for any two perpendicular vectors it hold the condition A.B =0 true.

By applying it, 5(2) + 9(2) + (-4)(-c) = 0

                           10 + 18 - 4c = 0

                                4c = 28

                                   c = 7

Hope my answer helps u....