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  • Explain solution RD Sharma Class 12 Chapter 26 Direction Cosines and Direction Ratios Exercise Very Short Answer Question, question 22 Maths.

Explain solution RD Sharma Class 12 Chapter 26 Direction Cosines and Direction Ratios Exercise Very Short Answer Question, question 22 Maths.

Answers (1)

Answer:

\left(0,-\frac{1}{\sqrt{2}}, \frac{1}{\sqrt{2}}\right)

Hint:

Cosines are trigonometric ratio.

Given:

Lines makes 90^{\circ},135^{\circ} and 45^{\circ} with x, y and z-axis.

Solution:

Direction cosines =\cos 90^{\circ},\cos 135^{\circ},\cos 45^{\circ} 

=\left(0,-\frac{1}{\sqrt{2}}, \frac{1}{\sqrt{2}}\right)

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