Please wait...
1800-212-7858 (Toll Free)
9:00am - 8:00pm IST all days
For Business Enquiry


Thanks, You will receive a call shortly.
Customer Support

You are very important to us

For any content/service related issues please contact on this toll free number


Mon to Sat - 11 AM to 8 PM

if l1,m1,n1 and l2,m2,n2 are the d.c.'s of two mutually perpendicular lines,show that the d.c.'s of the line perpendicular to both of these are m1n2-m2n1,nil2-n2l1,l1m2-l2m1

Asked by prabhakar p 13th March 2013, 9:18 AM
Answered by Expert
It is a simple formula. You can expand it and show that LHS = RHS. 
Or else, you can simply expand the denominator in the equation 4 and regroup the terms and you should reach what is written on the LHS here. 
Answered by Expert 14th March 2013, 7:33 AM
Rate this answer
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10

You have rated this answer /10

Your answer has been posted successfully!

Chat with us on WhatsApp