Under what condition are the two lines `y = m/l x + alpha , z= n/l x + beta` and `y= (m')/(l') x + alpha '`, `z

Ask a Question


Question Asked by a Student from EXXAMM.com Team


Q 2369391215.     Under what condition are the two lines

`y = m/l x + alpha , z= n/l x + beta` and `y= (m')/(l') x + alpha '`,

`z =( n')/(l') x + beta'` orthogonal'?
NDA 2008 Paper 1
A

`alpha alpha' + beta beta' +1 =0`

B

`(alpha + alpha ') (beta + beta') =0`

C

`ll'+mm'+n n'= 1`

D

`ll'+mm'+n n' =0`

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