HP 38g Graphing Calculator - Manual (Page 101)

Symbolic View
Keys
Key Meanin©
{{EDIT}} Copies the highlighted expression to the edit
line for editing. Press {{OK}} when done.
{{^CHK}} Checks/unchecks the current expression.
Only the checked expression is evaluated.
{{=}}
Types an equals sign into the equation.
{{SHOW}} Displays the current equation in standard
mathematical form.
{{EVAL}} Evaluates the current equation by
substituting other variables for all variables
except the independent variable, which
remains in symbolic form.
1 var | Menus for entering variable names, contents
1 MATH 1 of variables, or math functions.
m [CHARS] Displays special characters. To type one,
highlight it and press {{ ok }}.
(MD
Deletes the highlighted equation or the
current character in the edit line.
m [CLEAR] Deletes all equations in the list or clears just
the edit line, if it was active.
Angle Setting The only setting for the Symbolic view is the angle measure.
This is significant only if any of the equation’s variables
contain trigonometric functions.
To check or change the angle measure, press ■ [SETUP-
SYMB]. The choices are Radians, Degrees, and Grads. This
setting can affect the numeric solutions, as well as the graph.
Solve 4-3