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Please answer this question as soon as posskble i have my test today

Please answer this question as soon as posskble i have my test today

Question Image
Grade:12

1 Answers

Eshan
askIITians Faculty 2095 Points
3 years ago
Dear student,

\vec{a}\times \vec{j}is perpendicular to\vec{j}. Hence their dot product will be zero.

The product reduces to(\vec{a}\times \vec{j}).(-3\hat{k})=-3\vec{k}.(\vec{a}\times \vec{j})=-3(\vec{a}.\vec{i})=-12

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