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What are the direction cosines of a line that makes angles of 60°, 45°, and 30° with the x, y, and z axes, respectively?

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MCQ_SA

Single Answer MCQ

Q-00078335

√3/2, 1/√2, 1/2

1/√3, 1/√3, 1/√3

1/2, 1/√3, √3/2

1, 1, 1

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Q1.

What are the direction cosines of a line?

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?

Q3.

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

Q4.

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