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  • Need solution for RD Sharma Maths Class 12 Chapter 26 Directions Cosines and Direction Ratios Exercise Very Short Answer Question, question 5.

Need solution for RD Sharma Maths Class 12 Chapter 26 Directions Cosines and Direction Ratios Exercise Very Short Answer Question, question 5.

Answers (1)

Answer:

7, -2, 3

Hint:

Distance =\left|\frac{a x_{1}+b y_{1}+c z_{1}+d}{\sqrt{a^{2}+b^{2}+c^{2}}}\right|

Given:

P(7, -2, 3) from xy plane

Solution:

Distance of P(7, -2, 3) from xy-plane

i.e, z=0, a=0, b=0, c=1, d=0

Distance=\left|\frac{0 \times 7+0 \times-2+1 \times 3+0}{\sqrt{0^{2}+0^{2}+1^{2}}}\right|=3

Distance of P(7, -2, 3) from yz-plane

i.e, x=0, a=1, b=0, c=0, d=0

Distance=\left|\frac{1 \times 7+0 \times-2+0 \times 3}{\sqrt{1^{2}+0^{2}+0^{2}}}\right|=7

Distance of P(7, -2, 3) from y, xz plane is -2.

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