# Wrap a sinusoid around the circumference of a circle

Swulf shared this question 9 years ago

Hello,

I am stuck on finding a way to 'wrap' a sinusoid around the circumference of a circle.

I am performing an investigation where I need to consider the radial surface features of a disk, which would obviously normally be a simple circle (i.e. the radius would be constant). Instead I want to consider the effect of periodic errors in the radius, so that it varies sinusoidally with rotation angle of the disk.

I am unable to come up with a way to create such an object in Geogebra. Can anyone give me an idea how to accomplish this?

I hope this is clear; if not, maybe I can sketch what I mean...

Thank you,

Swulf

1

Hello,

I am stuck on finding a way to 'wrap' a sinusoid around the circumference of a circle.

I am performing an investigation where I need to consider the radial surface features of a disk, which would obviously normally be a simple circle (i.e. the radius would be constant). Instead I want to consider the effect of periodic errors in the radius, so that it varies sinusoidally with rotation angle of the disk.

I am unable to come up with a way to create such an object in Geogebra. Can anyone give me an idea how to accomplish this?

I hope this is clear; if not, maybe I can sketch what I mean...

Thank you,

Swulf

if you are talking about ro= f(alfa) you can parametrize to f(alfa)*cos(alfa) f(alfa)*sin(alfa)

saludos

https://ggbm.at/553205

1

Thank you very much, this is exactly what I was trying to learn how to do! :D