(hatj+hatk)×hatk=?

A. 1

hati

hatj

hatk

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সঠিক উত্তরঃ B.

hati

Explanation:

Another Explanation (5): ```html

প্রশ্ন: \(\hat{j}+\hat{k}\) × \(\hat{k}\) = ?

সমাধান:

আমরা জানি,

\(\hat{i}\) × \(\hat{j}\) = \(\hat{k}\)
\(\hat{j}\) × \(\hat{k}\) = \(\hat{i}\)
\(\hat{k}\) × \(\hat{i}\) = \(\hat{j}\)
\(\hat{i}\) × \(\hat{i}\) = \(\vec{0}\)
\(\hat{j}\) × \(\hat{j}\) = \(\vec{0}\)
\(\hat{k}\) × \(\hat{k}\) = \(\vec{0}\)

এখন, (\(\hat{j}+\hat{k}\)) × \(\hat{k}\) = \(\hat{j}\) × \(\hat{k}\) + \(\hat{k}\) × \(\hat{k}\) 🤓 = \(\hat{i}\) + \(\vec{0}\) 🎉 = \(\hat{i}\) ✅ অতএব, (\(\hat{j}+\hat{k}\)) × \(\hat{k}\) = \(\hat{i}\) 😊 ```