HP 39gs - Manual (Page 269)

Extending aplets 19-3
Using a customized aplet
To use the “Triangles” aplet, simply select the appropriate
formula, change to the Numeric view and solve for the
missing variable.
Find the length of a ladder leaning against a vertical wall
if it forms an angle of
35 o with the horizontal and
extends 5 metres up the wall.
1. Select the aplet.
TRIANGLES
2. Choose the sine formula
in E1.
3. Change to the Numeric
view and enter the
known values.
35
5
4. Solve for the missing
value.
The length of the ladder
is approximately 8.72 metres
Resetting an aplet
Resetting an aplet clears all data and resets all default
settings.
To reset an aplet, open the Library, select the aplet and
press .
You can only reset an aplet that is based on a built-in
aplet if the programmer who created it has provided a
Reset option.
HP 39gs English.book Page 3 Wednesday, December 7, 2005 11:24 PM