First slide

Straight lines in 3D

Question

$l = m = n = 1$ represents the direction ratios of

Moderate

A

x-axis
B

y-axis
C

z-axis
D

A line which makes equal angles with coordinates axes in three dimensional geometry

Solution

Direction ratios of $x, y, z$ axes are respectively $1, 0, 0; 0, 1, 0$ and $0, 0, 1$ .

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