HP How to Use the Prime Graphing Calculator: Explore the Trig Explorer App

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 Iand select

Trig Explorer.

An equation is shown at the top of the display, with its graph shown below it.

Choose the type of

function you want to explore by tapping either or

.

304 The Explorer apps