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  • Need solution for RD Sharma Maths Class 12 Chapter 24 Vector Or Cross Product Exercise Very Short Answer Question, question 28.

Need solution for RD Sharma Maths Class 12 Chapter 24 Vector Or Cross Product Exercise Very Short Answer Question, question 28.

Answers (1)

ANSWER:

 2

HINT:

Use formula of dot product and cross product

GIVEN: \left (\hat{i}\times \widehat{j} \ \right )\cdot \hat{k}+(\hat{i} \times \hat{k}) \cdot \hat{j}

SOLUTION:

\begin{aligned} &\left (\hat{i}\times \widehat{j} \ \right )\cdot \hat{k}+(\hat{i} \times \hat{k}) \cdot \hat{j} \cdot \hat{k}+(\hat{i} \times \hat{k}) \cdot \hat{j} \\ &=\hat{k} \cdot \hat{k}+\hat{j} \hat{j} \hat{j})+(\hat{k} \cdot \hat{j}) \\ &=1+1+0 \\ &=2 \end{aligned}

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