my interest in openteacher is the collaborative and free to use work
and i propose to study the way to demonstrate how two exponential function can create a sinusoidal function
by graphic simulation
i think there is nothing new under the sun (litteral translation of french) and this graphical demonstration exists
but, in accordance to this blog/wiki/web site ???, further requirements about license, copyright .... comes
so my project is to see
-what is already done
-is requirements are full
-develop in parallelism a proper application

un site qui je pense peut être référencé
http://www.compadre.org/osp/

je découvre ce logiciel qui permet d'afficher parrallélement et de maniére dynamique une équation analytique et la figure géométrique associée
Ca a l'air trés puissant
des avis ??