1-22 Operating the TI-83
8301OPER.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 12:09 PM Printed: 02/19/01 1:34
PM Page 22 of 24
The Equation Operating System (EOSé) defines the order
in which functions in expressions are entered and
evaluated on the TI.83. EOS lets you enter numbers and
functions in a simple, straightforward sequence.
EOS evaluates the functions in an expression in this order:
1 Single-argument functions that precede the
argument, such as ‡(, sin(, or log(
2 Functions that are entered after the argument,
such as 2, M1, !, ¡, r, and conversions
3 Powers and roots, such as 2^5 or 5x‡32
4 Permutations (nPr) and combinations (nCr)
5 Multiplication, implied multiplication, and
division
6 Addition and subtraction
7 Relational functions, such as > or
8 Logic operator and
9 Logic operators or and xor
Within a priority level, EOS evaluates functions from left to
right.
Calculations within parentheses are evaluated first.
Multiargument functions, such as nDeriv(A2,A,6), are
evaluated as they are encountered.
Equation Operating System (EOS™)Order of
Evaluation