TWINS (22 May) Activity 3 (Page)
(A) Try it Out:
Instructions:
1.   Click the "Play" button below.
   (a)   Observe what happens
2.   Check the checkboxes.
   (a)   Observe what happens.
Sample file:
(B) Hands-on Activity:
Instructions:
1.   Create a graph f(x)=sin(x).
   a.   Type “ sinx ” into the Algebra input bar.
2.   Create a graph g(x)=cos(x).
   a.   Type “ cosx ” into the Algebra input bar.
3.   Create a checkbox to show/hide g.
4.   Hide g.
5.   Create the graph f'(x).
   a.   Type “ Derivative(f) ” into the Algebra input bar.
      Note: Derivative( {function} )
6.   Create a point A on f.
7.   Create a point B on f'(x) that follows A.
   a.   Type “ (x(A), f'(x(A))) ” in the Algebra input box. 
8.   Hide f'.
9.   Show trace for point B.
10.   [optional] Show f'. (see trace compared to full graph)
11.   Turn animation on for point A.
12.   Show g. (compared derivative of f to g)