# Ellipse rotating in function of third dimension "z"

chiarageogebra shared this question 1 year ago

I am trying to model an ellipse that rotates as it rises along the third dimension (z axis).

I understood that this can be done by using the equation attached with angle pheta being equal to z. I know this can work with Wolfgram Mathematica. However, I wanted to do this with GeoGebra, which doesn't seem to support this. Is there a way to make it work?

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1) is that the correct screenshot?

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Yes, that was a wrong screenshot, I apologize.

I attached the correct screenshot and the .ggb file

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You can try in beta - as you can see it's not fully working yet

Maybe the Surface() command can do what you want?

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Hi,

it looks like a quadratic equation in x (or y) which you can solve and get an expression like x=... (or y=....)

On the right side are expressions in y & z (or x & z) so you get instead of x= ... (or y=...) a funcion f(y,z) in y & z (or f(x,z) in x & z) and I guess, that GeoGebra can handle these functions.

Of course you had to keep in mind to change the x- (or y-axes) with the z-axes.

Greetings and I hope that helps

mire2

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Such as this file

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