Some properties of secantoptics of ovals

摘要

In this paper we continue the investigation of further properties of secantoptics introduced and considered by Skrzypiec (Beitr?ge Algebra Geom. 49(1):205-215, 2008) and by Mozgawa and Skrzypiec (Bull. Belg. Math. Soc. Simon Stevin 16(3):435-445, 2009). We describe properties of secantoptics of ovals of constant width, prove a theorem on tangents to secantoptic and give the converse of the sine theorem for secantoptics.