Ask Questions, Get Answers
Menu
X
JEEMAIN Crash Practice
15 Test Series
NEET Crash Practice
5 Test Series
CBSE XII
Math
JEEMAIN
Math
Physics
Chemistry
Practice Test Series
CBSE XI
Math
NEET
Physics
Chemistry
Biology - XII
Biology - XI
Olympiad class V
Math - 5 Test Series
Olympiad class VI
Math - 5 Test Series
studyplans
JEEMAIN Crash Practice
15 Test Series
NEET Crash Practice
5 Test Series
CBSE XII
Math
JEEMAIN
Math
Physics
Chemistry
Practice Test Series
CBSE XI
Math
NEET
Physics
Chemistry
Biology - XII
Biology - XI
Olympiad class V
Math - 5 Test Series
Olympiad class VI
Math - 5 Test Series
mobile
exams
ask
sample papers
tutors
pricing
sign-in
Download our FREE mobile app with 1000+ tests for CBSE, JEE MAIN, NEET
X
Search
Topics
Want to ask us a question?
Click here
Browse Questions
Student Questions
Ad
Home
>>
EAMCET
>>
Mathematics
0
votes
The angle between the lines whose direction cosines satisfy the equations $l+m+n=0,l^2+m^2-n^2=0$ is :
\[\begin {array} {1 1} (1)\;\frac{\pi}{6} & \quad (2)\;\frac{\pi}{4} \\ (3)\;\frac{\pi}{3} & \quad (4)\;\frac{\pi}{2} \end {array}\]
jeemain
eamcet
math
2009
q32
Share
asked
Oct 9, 2013
by
meena.p
Please
log in
or
register
to add a comment.
Can you answer this question?
Do not ask me again to answer questions
Please
log in
or
register
to answer this question.
1 Answer
0
votes
$(3)\;\frac{\pi}{3}$
answered
Nov 7, 2013
by
pady_1
Please
log in
or
register
to add a comment.
Related questions
0
votes
1
answer
Find the angle between the lines whose direction cosines are given by the equations $l+m+n=0,l^2+m^2-n^2=0$
asked
Jan 3, 2013
by
sreemathi.v
cbse
class12
ch11
sec-b
q12
p235
exemplar
difficult
math
0
votes
1
answer
If the direction cosines of two lines are such that $l+m+n=0; l^2 +m^2-n^2=0$ then the angle between them is :
asked
Nov 6, 2013
by
meena.p
jeemain
eamcet
math
2006
q51
0
votes
0
answers
The angle between the lines whose direction cosines satisfy the equations $\;l+m+n=0\;$ and $\;l^{2}=m^{2}+n^{2}\;$ is :
asked
May 2, 2014
by
yamini.v
jeemain
mathematics
2014
set-e
0
votes
1
answer
The angle between the lines whose direction cosines satisfy the equations $1+m+n=0$ and $1^2=m^2+n^2$ is
asked
Apr 7, 2014
by
meena.p
jeemain
jeemain-2014
math
q58
medium
0
votes
1
answer
If a variable line in two adjacent positions has direction cosines l,m,n and $l+\delta l,m+\delta m,n+\delta n$,show that the small angle $\delta\theta$ between the two positions is given by \[\delta\theta^2=\delta l^2+\delta m^2+\delta n^2\]
asked
Jan 3, 2013
by
sreemathi.v
cbse
class12
ch11
sec-c
q13
p236
exemplar
difficult
math
0
votes
1
answer
If three unit vectors $\overrightarrow {a},\overrightarrow {b},\overrightarrow {c}$ satisfy $\overrightarrow {a}+\overrightarrow {b}+\overrightarrow {c}=\overrightarrow {0}$ then the angle between $\overrightarrow {a}$ and $\overrightarrow {b}$ is :
asked
Sep 26, 2013
by
meena.p
jeemain
eamcet
math
2010
q32
0
votes
1
answer
The angle between the lines whose direction cosines are $\bigg(\large\frac{\sqrt 3}{4},\frac{1}{4},\frac{\sqrt 3}{2}\bigg)$ and $ \bigg(\large\frac{\sqrt 3}{4},\frac{1}{4},\frac{-\sqrt 3}{2} \bigg)$ is
asked
Oct 17, 2013
by
meena.p
jeemain
eamcet
math
2008
q52
Ask Question
SUBMIT QUESTION
►
Please Wait
Take Test
JEEMAIN Crash Practice
15 Test Series
NEET Crash Practice
5 Test Series
JEEMAIN
350+ TESTS
NEET
320+ TESTS
CBSE XI MATH
50+ TESTS
CBSE XII MATH
80+ TESTS
x
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App
...