If a vector $2\widehat i + 3\widehat j + 8\widehat k$ is perpendicular to the vector $4\widehat j + 4\widehat i + \alpha \widehat k,$ then the value of $\alpha $ is - DASH

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Question

If a vector $2\widehat i + 3\widehat j + 8\widehat k$ is perpendicular to the vector $4\widehat j + 4\widehat i + \alpha \widehat k,$ then the value of $\alpha $ is

1/2

$-$ 1/2

1

$-$ 1.

Solution

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