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Question
Vectors `vecA = 5hati - ahatj + 3hatk` and `vecB = 10hati + 8hatj + bhatk` are parallel to each other, then values of 'a' and 'b' are
Options
4, 6
4, – 6
– 4, 6
– 4, – 6
MCQ
Solution
– 4, 6
Explanation:
`vecA` and `vecB` are parallel to each other. This implies `vecA = mvecB`.
`10/5 = 8/(-a) = b/3`
∴ a = – 4, b = 6
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