HP 49g Graphing Calculator - Manual (Page 114)

For example, consider the expression sin (x^ + 2 x ) .
If the value for variable X is defined as in the current path:
® When the Approx option is set, evaluating the expression retiu-ns
-.586176193022
® Wlien Approximate mode is clear, evaluating the expression returns
SIN(4V2).
Other options
hi addition to the above options, the CAS Modes input fomi is used to set
the following parameters;
® Independent variable
The independent variable is the default variable that the calculator
uses for operations such as differentiation and integration. The default
value is X.
® Modulo
Enter the modulus that you want to use m modulo arithmetic
operations. The default value is 3.
® Complex
Check this option if you want to work with complex numbers. If you
do not need to use complex numbers, de-select this option. Some
transformations behave differently in complex mode.
If complex mode is not set and a calculation returns only a complex
solution for most calculations, the calculator prompts for a switch to
complex mode.
® Verbose
Check this option to display messages that indicate progress as the
calculator performs the operations that you specify.
® Step/step
Check this option to perform linear algebra operations, integrations,
and differentiations in step-by-step mode. See “Differentiating an
expression step-by-step” on page 5-19.
® Incr Pow
Check this option to display polynomial expressions with the tenns in
increasing power order, for example a - - i - a ^ + ■ The default is to
display polynomials with tire tenns in decreasing order.
Page 5-4 Working with expressions