Manual

42 Getting started

You can repeat the previous calculation simply by pressing

E. This can be useful if the previous calculation

involved Ans. For example, suppose you want to calculate

the nth root of 2 when n is 2, 4, 8, 16, 32, and so on.

1. Calculate the square root of 2.

Sj2E

2. Now enter √Ans.

SjS+E

This calculates the fourth root of 2.

3. Press E

repeatedly. Each time

you press, the root is

twice the previous

root. The last answer

shown in the

illustration at the right

is .

To reuse an

expression or result

from the CAS

When your are working in Home view, you can retrieve

an expression or result from the CAS by tapping Z and

selecting Get from CAS. The CAS opens. Press

until the item you want to retrieve is highlighted and

press E. The highlighted item is copied to the cursor

point in Home view.

Storing a value in a variable

You can store a value in a variable (that is, assign a value

to a variable). Then when you want to use that value in a

calculation, you can refer to it by the variable’s name. You

can create your own variables, or you can take advantage

of the built-in variables in Home view (named A to Z and

) and in the CAS (named a to z, and a few others). CAS

variables can be used in calculations in Home view, and

Home variables can be used in calculations in the CAS.

There are also built-in app variables and geometry

variables. These can also be used in calculations.