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54 Computer algebra system (CAS)
The menu buttons in CAS view are:
• : assigns an object to a variable
• : applies common simplification rules to reduce an
expression to its simplest form. For example,
simplify(e
a + LN(b*e
c
)
) yields b*EXP(a)*EXP(c).
• : copies a selected entry in history to the entry line
• : displays the selected entry in full-screen mode,
with horizontal and vertical scrolling enabled. The entry
is also presented in textbook format.
CAS calculations
With one exception, you perform calculations in CAS view
just as you do in Home view. (The exception is that there is no
RPN entry mode in CAS view, just algebraic and textbook
modes). All the operator and function keys work in the same
way in CAS view as Home view (although all the alpha
characters are lowercase rather than uppercase). But the
primary difference is that the default display of answers is
symbolic rather than numeric.
You can also use the template key (
F) to help you insert the
framework for common calculations (and for vectors and
matrices). This is explained in detail in “Math template” on
page 24.
The most commonly used
CAS functions are available
from the CAS menu, one of
the Toolbox menus. To
display the menu, press
D. (If the CAS menu is not
open by default, tap
.) Other CAS
commands are available from the Catlg menu (another of the
Toolbox menus).
To choose a function, select a category and then a command.