Sinusoidales functions in polygons(Geogebra 4.25 in html5)

A ggb file long to open on html , it is better in java

http://dmentrard.free.fr/GEOGEBRA/Maths/export4.25/sinpoly2.html

A Geogebra applet in html5 with the 4.25 version

http://dmentrard.free.fr/GEOGEBRA/index.html