Let L and N be adjacent cusps of a cycloid.
Let P be a point on the cycloid between L and N.

Construct with straightedge and compass the tangent line to the cycloid at point P.

(In reply to re: Re: Solution (Harry) (spoiler) by brianjn)

It still has yet to be demonstrated how the tangent line to the cycloid at point P is constructed with straightedge and compass.

Posted by Dej Mar on 2010-01-12 14:54:39