What is the projection of the line segment joining A(1, 7, -5) and B(-3, 4, -2) on y-axis?

NDA 2021 Mathematics question

What is the projection of the line segment joining and on -axis?

Answer: (C)

The projection of the segment joining and on the -axis is , because the direction cosines of the -axis are .

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Question ID VK-033559