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 transformed equation of $x^2+6xy+8y^2=10$ when the axes are rotated through an angle $\large\frac{\pi}{4}$ is :
\[\begin {array} {1 1} (a)\;15x^2-14xy+3y^2=20 & \quad (b)\;15x^2+14xy-3y^2=20 \\ (c)\;15^2+14xy+3y^2=20 & \quad (d)\;15x^2-14xy-3y^2=20 \end {array}\]
jeemain
eamcet
math
2006
q44
Share
asked
Nov 6, 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
$ (c)\;15^2+14xy+3y^2=20$
answered
Nov 7, 2013
by
pady_1
Please
log in
or
register
to add a comment.
Related questions
0
votes
0
answers
The transformed equation of $x^2+y^2=r^2$ when the axes are rotated through an angle $36^{\circ}$ is :
asked
Oct 10, 2013
by
meena.p
jeemain
eamcet
math
2009
q42
0
votes
1
answer
The transformed equation of $3x^2+3y^2,2xy=2$ when the coordinate axes are rotated through an angle of $45^{\circ}$ is
asked
Oct 17, 2013
by
meena.p
jeemain
eamcet
math
2008
q46
0
votes
1
answer
The origin is translated to (1,2). The point $(7,5)$ in the old system undergoes the following transformations successively. (i) Moves to the new point under the given translation of origin. (ii) Translated through 2 units along the negative direction of the new X-axis. (iii) Rotated through an angle $\large\frac{\pi}{4}$ about the origin of new system in the clockwise direction. The final position of the point (7,5) is
asked
Sep 16, 2013
by
meena.p
jeemain
eamcet
math
2013
q42
0
votes
1
answer
If one of the lines in the pair of straight lines given by $4x^2+6xy+ky^2=0$ bisects the angle between the coordinate axes, then $k \in$
asked
Sep 23, 2013
by
meena.p
jeemain
eamcet
math
2011
q64
0
votes
1
answer
Equations of the latus rectum of the ellipse $9x^2+4y^2-18x -8y-23=0$ are :
asked
Nov 6, 2013
by
meena.p
jeemain
eamcet
math
2006
q56
0
votes
1
answer
The equation of the line passing through the point of intersection of the lines $x-3y+2=0$ and $2x+5y-7=0$ and perpendicular to the line $3x+2y+5=0$ is :
asked
Nov 6, 2013
by
meena.p
jeemain
eamcet
math
2006
q46
0
votes
1
answer
The polar equation of the circle with center $\bigg( 2, \large\frac{\pi}{2}\bigg)$ and radius 3 units is :
asked
Nov 6, 2013
by
meena.p
jeemain
eamcet
math
2006
q59
Ask Question
Tag:
Math
Phy
Chem
Bio
Other
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
...