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NDA 2013
Exam
NDA
Year
2013
Subject
Mathematics
Chapter
Three Dimensional Geometry

NDA 2013 · Mathematics · Three Dimensional Geometry

The sum of the direction cosines of z -axis is

The sum of the direction cosines of zz-axis is

Options

  1. A00
  2. B1/31 / 3
  3. C11
  4. D33

Correct answer

C. 11

Step-by-step solution

Direction cosines are 0,0,1 Sum =10,0,1\text{ Sum }=1
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