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Question Practice

Find the direction cosines if a line has direction ratios -18, 12, -4.

Attempt the question, check the explanation, and continue with similar questions to build confidence before exams.

MCQ_SA
CBSE
Class 12
Mathematics
Mathematics Part - II
Three Dimensional Geometry
Question Bank

Find the direction cosines if ...

Single Answer MCQ
Q-00078320

Find the direction cosines if a line has direction ratios -18, 12, -4.

1

-3/5, 2/5, -1/5

2

3/5, -2/5, 1/5

3

4/5, 3/5, -1/5

4

-1/5, 2/5, -3/5

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Continue with nearby questions to strengthen the same chapter concept while you still have the context fresh in mind.

Q1.

What are the direction cosines of a line?

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Q2.

If a line makes angles α, β, and γ with the x, y, and z axes, respectively, what is true about the direction cosines l, m, n?

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Q3.

What do direction ratios represent for a line in three-dimensional space?

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Q4.

What happens to the direction cosines if the direction of a line is reversed?

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