HP Prime Graphing Wireless Calculator Instrukcja Użytkownika Strona 390

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The app displays the graph of a randomly chosen quadratic function. Tap the Level button to choose between
one of four forms of quadratic equation. You can also choose graphs that are relatively easy to match or
graphs that are harder match (by tapping or respectively).
Now press the cursor keys to select a parameter and set its value. When you are ready, tap to see if
you have correctly matched your equation to the given graph.
Tap to see the correct answer and tap to exit Test mode.
Trig Explorer app
The Trig Explorer app can be used to investigate the behavior of the graphs y = a ·sin(bx + c) + d and y = a
·cos(bx + c) + d as the values of a, b, c and d change.
The menu items available in this app are:
or : toggles between graph mode and equation mode.
or : toggles between sine and cosine graphs.
or : toggles between radians and degrees as the angle measure for x.
or : toggles between translating the graph ( ), and changing its frequency
or amplitude ( ). You make these changes using the cursor keys.
: enters test mode.
or : toggles the increment by which parameter values change: π/9, π/6, π/4, or 20°,
30°, 45° (depending on angle measure setting).
Open the app
Press and select Trig Explorer.
An equation is shown at the top of the display, with its graph shown below it.
342 Chapter 21 The Explorer apps
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