Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • A vector makes angles <img alt="\frac{\pi }{3} , \frac{\pi }{6} , \frac{\pi }{2}" src="https://entrancecorner.oncodecogs.com/gif.latex?%5Cfrac%7B%5Cpi%20%7D%7B3%7D%20%2C%20%5Cfrac%7B%5Cpi

A vector makes angles \frac{\pi }{3} , \frac{\pi }{6} , \frac{\pi }{2}  with positive x, y and z axis respectively, then it has one of the direction ratios as

Option: 1

-2,\sqrt{3},1


Option: 2

2,-\sqrt{3},0


Option: 3

\sqrt{3},2,0


Option: 4

-1,-\sqrt{3},0


Answers (1)

best_answer

l = cos\frac{\pi }{3}=\frac{1}{2}; m=cos\frac{\pi }{6}=\frac{\sqrt{3}}{2}; n= cos\frac{\pi }{2}=0

Multiplying these DC's by (-2), we get one of the DRs of the vector, which gives us -1,- \sqrt{3},0

Posted by

Divya Prakash Singh

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions