If `l_1, m_1 , n_1 , l_2 , m_2, n_2` and `l_3 , m_3 , n_3` are the direction cosines of three mutually perpendicular lin

Ask a Question


Question Asked by a Student from EXXAMM.com Team


Q 1860634515.     If `l_1, m_1 , n_1 , l_2 , m_2, n_2` and `l_3 , m_3 , n_3` are the direction cosines of three mutually perpendicular lines, then prove that the line whose direction cosines are proportional to `l_1 + l_2 + l_3 , m_1 + m_2 + m_3` and `n_1 + n_2 + n_3` makes equal angles with them .

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