HP 39gs Quick Start Manual page 56

Table 1- 1 3 Trig Explorer Aplet Summary
Summary of Functionality
Press PLOT to return to this view at any time. If needed, press the ORIG menu key to toggle it
to EXTR. You can dilate the graph of sin(x) or cos(x) and see the effect on the equation
parameter(s). The controls are:
Use the left- and right-cursor keys to dilate the graph with respect to the x-axis
•
• Use the up- and down-cursor keys to dilate the graph with respect to the y-axis
In addition to the controls listed above, the menu contains the following items:
SIN: toggles between sin(x) and cos(x)
•
• RAD: toggles between radians and degrees
• EXTR/ORIG: toggles between dilating the graph and translating it with the cursor keys
• INCR: choose the increment by which the value of c is increased or decreased
• RESET: reset the Aplet
Press the EXTR menu key to toggle it to ORIG. Now use the cursor keys to translate the graph
and see the effect on the equation parameters. The controls are:
Use the left- and right-cursor keys to translate the graph horizontally
•
• Use the up- and down-cursor keys to translate the graph vertically
50 Getting Started
View Name and Display
Trig Explorer with EXTR
Trig Explorer with EXTR
Trig Explorer with ORIG