What is the sum of the squares of direction cosines of the line joining the points `(1, 2,-3)` and `(-2, 3, 1)`?

Ask a Question


Question Asked by a Student from EXXAMM.com Team


Q 2359645514.     What is the sum of the squares of direction
cosines of the line joining the points `(1, 2,-3)` and `(-2, 3, 1)`?
NDA 2012 Paper 1
A

`0`

B

`1`

C

`3`

D

`2/(sqrt (26))`

HINT


Solution
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

Find instant solution to any question from our database of 1.5 Lakh + Questions

 


Access free resources including

  • 100% free video lectures with detailed notes and examples
  • Previous Year Papers
  • Mock Tests
  • Practices question categorized in topics and 4 levels with detailed solutions
  • Syllabus & Pattern Analysis

Engineering


Medical


Banking


DEFENCE


SSC


RRB


CBSE-NCERT


OLYMPIAD