symbolic views of the aplets in the following table. See “Aplet view configuration” on page 1-18for further information.

Aplet

Use this aplet to explore:

name

 

 

 

Function

Real-valued, rectangular functions y in

 

terms of x. Example: y = 2x2 + 3x + 5 .

Inference

Confidence intervals and Hypothesis

 

tests based on the Normal and

 

Students-t distributions.

Parametric

Parametric relations x and y in terms of

 

t. Example: x = cos(t) and y = sin(t).

Polar

Polar functions r in terms of an angle θ.

 

Example: r = 2 cos(4θ) .

Sequence

Sequence functions U in terms of n, or

 

in terms of previous terms in the same or

 

another sequence, such as Un – 1 and

 

Un – 2 . Example: U1 = 0 , U2 = 1

 

and Un = Un – 2 + Un – 1 .

Solve

Equations in one or more real-valued

 

variables. Example: x + 1 = x2 – x – 2 .

Finance

Time Value of Money (TVM)

 

calculations.

Linear

Solutions to sets of two or three linear

Solver

equations.

Triangle

Unknown values for the lengths and

Solver

angles of triangles.

Statistics

One-variable (x) or two-variable (x and

 

y) statistical data.

 

 

In addition to these aplets, which can be used in a variety of applications, the HP 39gs is supplied with two teaching aplets: Quad Explorer and Trig Explorer. You cannot modify configuration settings for these aplets.

A great many more teaching aplets can be found at HP’s web site and other web sites created by educators, together with accompanying documentation, often with student work sheets. These can be downloaded free of

Getting started

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