Position of a Point Rotating About a Moving Rotation Point

I am looking for a way to calculate (and plot in x-y space) the position of a point as it rotates about a shifting rotation point. The rotation point is moving away from the point I am trying to plot.

Ideas?

[Paul Huter]

I want to plot the position of Point P with regards to the Origin O as Point P rotates about Point R. But the position of Point R with respect to Point P is changing.

Answer 1

[Chad Greene]

Does the rotate function do what you need?

[Paul Huter]

That appears to be for rotating a 3D mesh.