Relate Sin(a + b) and Sin(a-b)

This demonstration uses area calculations.
Daniel Mentrard, Créé avec GeoGebra Translation to English by A. B. Cron [url]http://dmentrard.free.fr/GEOGEBRA/index.htm[\url]
– Auston B Cron

Información: Relate Sin(a + b) and Sin(a-b)