HP 48g Graphing Calculator - Manual (Page 137)

■ Press o® to obtain 7T.
m Press @S) ^ obtain e.
■ Press @(5) I to obtain t.
The HP 48 also provides 40 physical constants (with their units)
through its Constants Library. The CONST function allows these
constants to be used in symbolic form. See page 25-14 for details.
Controlling How Symbolic Constants are Evaluated
System flags —2 (Symbolic Constants) and —3 (Symbolic Results)
control whether evaluating symbolic constants return symbolic or
numeric results. The default setting for both flags is clear.
11
To control the ewalyation of symbolic constants;
B To leave a symbolic constant unchanged during evaluation, clear
flags —3 and —2 (their default states).
B To replace a symbolic constant wdth its numeric value during
evaluation, set flag —3.
B To replace a symbolic constant with its numeric value except
when it’s the argument of a function, clear flag —3 and set flag
—2. Pressing f EVAL ] causes the numeric value to be used, but the
execution of another function (/, SIN, LOG, and so forth) does not.
B To force all constants to evaluate numerically regardless of the flag
settings, press
S)(
-»NUMf
Using Built-In Math Functions
The next six chapters (chapters 12-17) are devoted to the built-in
math functions available on the HP 48. The functions are grouped
into chapters and divided into sections.
Most of the common arithmetic and scientific functions are located on
the main keyboard. But there are many, many more that are located
in the submenus accessed using the iMTH"l key. The following table
describes how to find each group of functions on the HP 48 and where
in the manual it is discussed.
Using Mathematical Functions 11-5