Question

I have this question on ellipse

Answer 1

Number 3

Answer 2

Here is an answer i found on yahoo. http://answers.yahoo.com/question/index?qid=20120206222845AApAIVs

Answer 3

I got center (0,0) and a=+- 2, like the asker, but why they the person that answered out a^2=4^2, shouldnt it have been 2^2, since a==-2

Answer 4

this is a rotated ellipse using a more generalized from of the conic equations

Answer 5

hmm, so i would have to find the generalized conic equation

Answer 6

Ax2 + Bxy + Cy2 + Dx + Ey + F = 0

Answer 7

i see what you mean amistre, but i have never had a question where i has to come up with the general equation, how would i do that

Answer 8

I wish I was more apt to answer that :) but I dont play with this enough to have a firm grasp of it

Answer 9

I can unrotate it so that its equivalent is a normal looking ellipse

Answer 10

now can you shed some light on what the guy on yahoo answered, cause it look like he came up with the standard equation of the eliipse

Answer 11

but the actual equation for the ellipse would invlove the rotation itself

Answer 12

i cant say how he got to his solution; or even if its correct.

Answer 13

but lets try to unravel this; we want to know the distance from the center of the ellipse to a focal point