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  • Provide Solution For R.D. Sharma Maths Class 12 Chapter 22 Algebra of Vectors Exercise Very Short Answer Type Question 22 Maths Textbook Solution.

Provide Solution For  R.D. Sharma Maths Class 12 Chapter 22 Algebra of Vectors  Exercise Very Short Answer Type  Question 22 Maths Textbook Solution.

Answers (1)

Answer: \frac{6}{7},\frac{-2}{7},\frac{3}{7}

Hint: You must know the rules of vector functions

Solution: \vec{r}=6\hat{i}-2\hat{j}+3\hat{k}

            The direction cosines are

 \begin{aligned} &\frac{6}{\sqrt{(6)^{2}+(-2)^{2}+(3)^{2}}}, \frac{-2}{\sqrt{(6)^{2}+(-2)^{2}+(3)^{2}}}, \frac{3}{\sqrt{(6)^{2}+(-2)^{2}+(3)^{2}}} \\ &\begin{array}{l} \end{array} \end{aligned}

\Rightarrow \frac{6}{\sqrt{49}}, \frac{-2}{\sqrt{49}}, \frac{3}{\sqrt{49}} \\

\Rightarrow \frac{6}{7}, \frac{-2}{7}, \frac{3}{7}

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