Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • School
  • Please Solve R.D.Sharma class 12 Chapter 22 Algbra of Vectors Exercise 22.9 Question 2 Maths Textbook Solution.

Please Solve R.D.Sharma class 12 Chapter 22 Algbra of Vectors Exercise 22.9 Question 2 Maths Textbook Solution.

Answers (1)

Answer: 1, 1, 1 cannot be the direction cosines of a straight line.

Given: Prove that 1, 1, 1 cannot be the direction cosines of a straight line.

Hint: Check by using l^{2}+m^{2}+n^{2}=1

Explanation: We know if l, m, n are the direction cosines of any line then l^{2}+m^{2}+n^{2}=1

But here 1^{2}+1^{2}+1^{2}=3\neq 1

So 1, 1, 1 can’t be the direction cosines for any line.

Posted by

infoexpert21

View full answer

Crack CUET with india's "Best Teachers"

  • HD Video Lectures
  • Unlimited Mock Tests
  • Faculty Support
cuet_ads

Similar Questions

Trending Articles/News

anam-khan

PM Modi's Pariksha Pe Charcha 2025 to be held next month, registrations open till January 14
anam-khan

CBSE Board Exams 2025: Online portal for availing exemptions by CWSN students opens
anam-khan

Board Exams: States agree to equivalence; no question paper ‘jumbling’ from next year, says PARAKH CEO

Latest Question