Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • NCERT
  • If a line makes angles 90°, 135°, 45° with the x, y and z-axes respectively, find its direction cosines.

1. If a line makes angles 90^{\circ}, 135^{\circ},45^{\circ} with the x, y and z-axes respectively, find its direction cosines.

Answers (1)

best_answer

Let the direction cosines of the line be l,m, and n.

So, we have

l = \cos90^{\circ}=0       

m = \cos135^{\circ}=-\frac{1}{\sqrt2}

n= \cos45^{\circ}=\frac{1}{\sqrt2}

Therefore the direction cosines of the lines are 0,\ -\frac{1}{\sqrt2},and\ \ \frac{1}{\sqrt2}.

Posted by

Divya Prakash Singh

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

CBSE reopens online portal for submission of LOC for Class 10, 12 board exams 2026; submit forms by Oct 8
anam-khan

CBSE private candidates challenge cancellation of post-Class 12 additional subject exam in Delhi HC
anam-khan

CBSE reminds schools to submit LOC for Class 10, 12 board exams 2026 by September 30

Latest Question