1||0|80|0|
0|0|0|||||derivative sine cosine  correction|g30380||18:53:05|09/11/2009|The applet below gives a geometric meaning of %283%29. Note how there are always to %28sic%29 equal right triangles%2C%0D%0A%0D%0Atwo.
1|1|0|||||RE%3A derivative sine cosine  correction|alexb||19:00:47|09/11/2009|Thank you. I very much appreciate your taking the time.