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  • Explain solution RD Sharma Class 12 Chapter 26 Direction Cosines and Direction Ratios Exercise Very Short Answer Question, question 13 Maths.

Explain solution RD Sharma Class 12 Chapter 26 Direction Cosines and Direction Ratios Exercise Very Short Answer Question, question 13 Maths.

Answers (1)

Answer:

z units

Hint:

z=0

Given:

P(x, y, z)

Solution:

In xy plane z co-ordinate is zero.

By distance formula.

\begin{aligned} &d=\sqrt{\left(x_{1}-x_{2}\right)^{2}+\left(y_{1}-y_{2}\right)^{2}+\left(z_{1}-z_{2}\right)^{2}} \\ &=\sqrt{(x-x)^{2}+(y-y)^{2}+(z-0)^{2}} \\ &=\sqrt{(z)^{2}} \\ &=z \text { units } \end{aligned}

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