nona.m.nona wrote:I must be forgetting something easy...
The
Distance Formula, maybe (or, perhaps more usefully, the square of it), plus a little solving...?
Don't forget that the points on the ellipse can be stated in terms of "y=", but you have to use two "halves":
. . . . .. . . . .. . . . .Then take a "half" (say, the "minus" half), note that the points on the ellipse are of the form:
. . . . ....and then plug the two "points" into the (square of the) Distance Formula:
. . . . .. . . . . . . . ... . . . . . . . .....and so forth.
Eliz.