Answer: (1,0,0).
- A (1,0,0)
- B (0,1,0)
- C (0,0,1)
- D (1,1,1)
Correct answer: A. (1,0,0)
Explanation: The positive x-axis makes angles 0, 90, 90 degrees with the x, y, z axes. So direction cosines = (cos0, cos90, cos90) = (1,0,0).
Three mutually perpendicular axes x, y, z meeting at the origin O, with a point P located by its (x, y, z) coordinates.
Concept context
Lines and planes in 3D space, direction cosines, distances, and angles