Texas Instruments TITANIUM TI-89 - Manual (Page 941)

Appendix B: Technical Reference 942
Table Table Table Table
Data/Matrix Data/Matrix Data/Matrix Data/Matrix
Miscellaneous Miscellaneous Miscellaneous Miscellaneous
Solver Solver Solver Solver
EOS (Equation Operating System) Hierarchy EOS (Equation Operating System) Hierarchy EOS (Equation Operating System) Hierarchy EOS (Equation Operating System) Hierarchy
This section describes the Equation Operating System (EOSé) that is used by the TI-89
Titanium / Voyage™ 200. Numbers, variables, and functions are entered in a simple,
straightforward sequence. EOS evaluates expressions and equations using
parenthetical grouping and according to the priorities described below.
Order of Evaluation Order of Evaluation Order of Evaluation Order of Evaluation
tblStart @ tbl tblInput
c1–c99 sysData*
main ok errornum
eqn* exp*
Leve
l
Operator
1 Parentheses ( ), brackets [ ], braces { }
2 Indirection (#)
3 Function calls
4
Post operators: degrees-minutes-seconds (
°
,',"), factorial (!),
percentage (%), radian (
ô
), subscript ([ ]), transpose (
î
)
5 Exponentiation, power operator (^)
6
Negation ( ë )
7 String concatenation (&)
8
Multiplication ( ù ), division (/)
9
Addition (+), subtraction ( ì )
10
Equality relations: equal (=), not equal ( ă or /=),
less than (<), less than or equal ( { or <=), greater than (>),
greater than or equal ( | or >=)
11 Logical not
12 Logical and
13 Logical or, exclusive logical xor