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Which of the following equations represents the standard form of a line in 3D space using direction ratios?

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MCQ_SA

Single Answer MCQ

Q-00078295

x/a = y/b = z/c

x + y + z = d

x^2 + y^2 + z^2 = r^2

x = λl + x0, y = λm + y0, z = λn + z0

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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?