Question

HELP PLEASE URGENT

Determine if the graph is symmetric about the x-axis, the y-axis, or the origin.

r = 4 cos 5θ

Answer 1

Hint!
The cosine graph is an even Function

Answer 2

so x axis?

Answer 3

YES!

Answer 4

Thank you! DO YOU HAVE TIME FOR ANYMORE?

Answer 5

let me see

Answer 6

Find the center, vertices, and foci of the ellipse with equation 2x2 + 8y2 = 16.

Answer 7

Ok the equation of an ellipse has either form (x+h)^2/a^2+(y+k)^2/b^2=1
note the result it's always 1! so before you do anything check it's in this form and tell me what your new equation should look like...

Answer 8

i have no idea how to do that like none of this makes any sense haha

Answer 9

ok you know how the equation of an ellipse should look like right?

Answer 10

no

Answer 11

it should look like

Answer 12

I want you to look it carefully and you should always remember it!

Answer 13

okay i have seen that before

Answer 14

see the 1 after the = sign that's important

Answer 15

okay

Answer 16

to make your equation 2x2 + 8y2 = 16 in the form we've seen the first step is to divide(both sides) by 16 do you see why

Answer 17

that would make our equation x2/8 + y2/2=1 which is in the form we've just seen