Appendix B: Technical Reference 934
Table
Data/Matrix
Miscellaneous
Solver
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
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
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