The ellipse equation is .
Find .
Apply derivative on each side with respect to .
Find the points when .
Substitute in the equation.
at the end points of the major axis.
End points of the major axis are .
Find the points when .
Substitute in the equation.
at the end points of the minor axis.
End points of the minor axis are .
End points of the major axis are .
End points of the minor axis are .