Three Dimensional Geometry Question 59

Question: The direction cosines of the line $ x=y=z $ are

[MP PET 1989]

Options:

A) $ \frac{1}{\sqrt{3}},\frac{1}{\sqrt{3}},\frac{1}{\sqrt{3}} $

B) $ \frac{1}{3},\frac{1}{3},\frac{1}{3} $

C) 1, 1, 1

D) None of these

Show Answer

Answer:

Correct Answer: A

Solution:

Direction cosines $ ( \frac{1}{\sqrt{3}},\frac{1}{\sqrt{3}},,\frac{1}{\sqrt{3}} ) $ .