ECTACO
®
jetBook
®
K-12
User Manual
55
• Use the
Speaker
key to place the cursor to the
Step
field. Enter the value
0.01
(the leading zero can be
omitted).
• Select the
=
key. The program calculates the
Y
-
coordinate for each value of
x
in intervals of
Step
, and
then plots the graph.
The program is capable of calculating a function value
for a given number. For example, to calculate
sinh(7)
,
please follow the steps below.
• Using the trackball, "press" the following on-screen
keys:
sinh
7
)
=
• For radians, select
Radian
.
• To graph in polar coordinates, select
Polar
.
• To access inverse functions, select
Inv
.
• To clear screen, select the
C/CE
key.
Scientific Calculator
This application performs basic arithmetic, such as
addition and subtraction, as well as functions found on a
scientific calculator, such as logarithms and factorials.
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