Equation for an Ellipse

Hi,

I am trying to create objects along a ellipse. I have the center
of the ellipse x,y coordinates, the lengths of both major and minor
radii, and the number of degrees up from the x axis.

I am looking for an equation where x1,y1 is the point on the ellipse
to add my object.
X1= ?
Y1= ?

I found the right formula for a circle but can't find it for an ellipse.

If you could point me where to look or provide the equations I would
be very grateful.

Thanks
Bob Jensen