NDA 2022 Mathematics question

Consider the following statements : 1. The direction ratios of -axis can be 2. The direction ratios of a line perpendicular to -axis can be Which of the statements given above is/are correct?

(A)1 only
(B)2 only
(C)Both 1 and 2Correct
(D)Neither 1 nor 2

Answer: (C)

Solution

1: the -axis has direction cosines , and any non-zero multiple such as is a set of direction ratios; correct. 2: the -axis has

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Question ID VK-029476