# Differences Between Functions And Operators; Real Number Functions In The Mth Menu - HP F2226A - 48GII Graphic Calculator User Manual

Graphing calculator.

In RPN mode:
All the functions described above, namely, ABS, SQ, √, ^, XROOT, LOG,
ALOG, LN, EXP, SIN, COS, TAN, ASIN, ACOS, ATAN, can be combined
with the fundamental operations (+-*/) to form more complex
expressions. The Equation Writer, whose operations is described in Chapter
2, is ideal for building such expressions, regardless of the calculator
operation mode.

## Differences between functions and operators

Functions like ABS, SQ, √, LOG, ALOG, LN, EXP, SIN, COS, TAN, ASIN,
ACOS, ATAN require a single argument. Thus, their application is ALG
mode is straightforward, e.g., ABS(x).
two arguments, e.g., XROOT(x,y). This function has the equivalent keystroke
sequence ‚".
Operators, on the other hand, are placed after a single argument or between
two arguments. The factorial operator (!), for example, is placed after a
number, e.g., 5~‚2`. Since this operator requires a single
argument it is referred to as a unary operator. Operators that require two
arguments, such as + - * / Q, are binary operators, e.g.,
3*5, or 4Q2.

### Real number functions in the MTH menu

The MTH (MaTHematics) menu include a number of mathematical functions
mostly applicable to real numbers. To access the MTH menu, use the
keystroke combination „´. With the default setting of CHOOSE boxes
for system flag 117 (see Chapter 2), the MTH menu is shown as the following
„À1.35`
0.25`„¼
0.85`„¾
1.35`„À
Some functions like XROOT require
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