The Trig Explorer Aplet - HP 39gs Quick Start Manual

Table 1- 1 2 Quadratic Explorer Aplet Summary
Summary of Functionality
The menu contains the following items:
HARD: choose a difficult problem
•
• EASY: choose an easy problem
• LEVEL: choose a type of quadratic equation (see LEVEL in Plot view above)
• CHECK: checks your current response
• ANSW: give up and view the correct response
• END: return to the Plot view

The Trig Explorer Aplet

Similar in concept to the Quadratic Explorer, the Trig Explorer Aplet is a micro-environment for exploring the relationship between the values of parame-
ters in sine or cosine equations and the shape of their graphs. The forms of the sinusoidal equations used are:
⋅ ( )
y a sin bx c d
= + +
⋅ ( )
y a cos bx c d
= + +
Press APLET, scroll to the Trig Explorer Aplet, and press the START menu key to get started. Table 1- 1 3 summarizes the Aplet's functionality. The Aplet opens
in the Plot view.
View Name and Display
Quadratic Explorer Test View
Getting Started 49