Q211 / 270 · NDA 2017 (Phase 1) · Mathematics

A straight line with direction cosines $(0,1,0)$ is

  • A
    parallel to $x$-axis
  • Correct answer
    B
    parallel to $y$-axis
  • C
    parallel to $z$-axis
  • D
    equally inclined to all the axes

Solution

D.C's $(0,1,0)$ Since $x$ and $z$ are zero, the straight line is parallel to $y$-axis

Hence, the correct answer is option: 'B'.

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