Find the equation for the ellipse with foci (1,1) and (-1,-1) and major axis of length 4
**seems to shifted an angle in the xy coordinates**

- anonymous

- schrodinger

See more answers at brainly.com

At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga.
Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus.
Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

Get this expert

answer on brainly

SEE EXPERT ANSWER

Get your **free** account and access **expert** answers to this

and **thousands** of other questions

- anonymous

The question say to identify the type of conic section whose equation is given and find the vertices and foci, i am unsure wheter i should mention that its seems to on an angle or do i just go ahead and write down the equation for this ellipse

- Directrix

Write the problem here exactly as the instructions appear in your book.

- anonymous

identify the type of conic section whose equation is given and find the vertices and foci:
Find the equation for the ellipse with foci (1,1) and (-1,-1) and major axis of length 4

Looking for something else?

Not the answer you are looking for? Search for more explanations.

## More answers

- anonymous

Eccentricity shall be given

- anonymous

the only thing given was:Find the equation for the ellipse with foci (1,1) and (-1,-1) and major axis of length 4

- anonymous

i have no problem finiding the equation, but its just that it looks tilted on the xy coordinate system, and i am wondering if i should find the angle its tilted on and how would i do so

- anonymous

Easy

- anonymous

\[\frac{(x-y)^2}{16}+\frac{(x+y)^2}{8}=1\]

- anonymous

okay, but the titlted part, does that have any impact

- anonymous

Yep it changes orientation n xy plane

- anonymous

and how do i find that angle

- anonymous

Angle of major axis with with horizontal is 45deg
same as angle between x-y and x axis

- anonymous

how did you determine that?

- anonymous

how did i determine what?

- anonymous

that the angle is 45 degrees

- anonymous

slope of x-y=0

- Directrix

Click the link to see the ellipse with equation: (x-y)^2/(16) + (x+y)^2/(8) =1
http://www.wolframalpha.com/input/?i=%28x-y%29%5E2%2F%2816%29+%2B+%28x%2By%29%5E2%2F%288%29+%3D1

- anonymous

i see its shifted at what looks like a 45 degree angle, but i am still unclear how to determine its a 45 degree angle

- Directrix

I would not worry about the angle. The instructions did not ask for it.

- anonymous

great answer

- anonymous

Thanx

- anonymous

what about this problem:

- anonymous

|dw:1328702038043:dw|

- anonymous

it says to Transform the following equatioon by a rotaion of axes into an equation that has no cross product term

- anonymous

Put x=Xsin(t)-Ycos(t)
y=Xsin(t)+Ycos(t)
and solve for t

- anonymous

what angle do you get?

- anonymous

after doing :|dw:1328702371977:dw|

- anonymous

?

- anonymous

what angle do you get, you know the angle to plug into sin(t) and cos(t)

- anonymous

More complicated than appears origin is also shifted

- anonymous

No more ideas

- anonymous

i get -pi/12, but i am unsure

- anonymous

If it eliminates xy then it has to be the answer

- anonymous

but what is cos(-pi/12)

- anonymous

never mind ans will be accepted by your instructor any way
it is

- anonymous

alright man thanks

- anonymous

cos(45-30)

- anonymous

but its -pi/12

Looking for something else?

Not the answer you are looking for? Search for more explanations.