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# Casio fx-CG50: Animation of a Graph

Casio fx-CG50:  Animation of a Graph

Introduction

You can easily animate a graph with the Dynamic Graphing mode.   While I’m describing this procedure for the fx-CG50, I’m pretty sure it is available for the earlier models such as fx-CG10, fx-9750GII, and fx-9860GII.

Specifically, you can dynamically change a single variable between two points with a specified step.

For example:  y = A*x  where A varies from 0 to 5, and its step is 1.

General Procedure

1.  Enter Dynamic Graph mode.  On the fx-CG50, press [ MENU ], [ 6 ].

2.  Type and select an equation.  The equation can be a function, a set of parametric equations, a polar equation, or on newer calculators, a shaded inequality.

3.  Press [ F4 ] (VAR) to take you to the variable screen.   Select the variable you want to animate.  You can animate any variable A – Z and θ.  Keep in mind that X is used for functions equations, T is used for parametric equations, and θ is for polar equations.

4.  Set the Animation Speed by pressing [ F3 ] (SPEED).  The speeds that can be selected are:

F1:  Stop & Go  (you advance the slides with the right and left arrows)
F2:  Slow speed
F3:  Normal speed
F4:  Fast speed

5.  Press [ F6 ] (DYNA) to start the animation.  To stop it, press [ AC ].

Example

x1(t) = 1.2 * A * cos T
y1(t) = A * sin (T + 1) * cos (π/(3*T))
with π/12 ≤ T ≤ 2 π, step π/12

Eddie

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