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Classic family · Pro

Classic CAS quick reference

Classic CAS is a computer-algebra calculator. It keeps exact answers such as fractions and roots, can solve, factor, expand, differentiate and integrate symbolically, and also draws graphs. You work on a calculator page with a history of lines and a separate graphs page.

Main screen: Press home to open the Home menu (Calculator, Graphs, Settings, and more). Choose Calculator, or press esc to go back to the calculation page. · Shift layer: ctrl · Second layer: shift

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Keys

esc
esc
Goes back or cancels a menu.
tab
tab
Moves to the next field; on the graphs page it draws the graph.
home
home
Opens the Home menu to choose a page or settings.
doc
doc
Opens the graphs page.
menu
menu
Opens the Menu of tools for the current page.
ctrl
ctrl
Next key uses its second function.
shift
shift
Next key uses its shift legend (braces on bracket keys).
var
var
Lists stored variables.
ctrlsto→
Stores a value in a variable (arrow).
del
del
Deletes the character before the cursor.
ctrlclear
Clears the whole entry line.
◀
◀
Moves the cursor left.
▲
▲
Moves up, or scrolls back through history.
catalog
catalog
Opens the catalog of all functions.
ctrl∞β°
Same as the catalog.
templates
templates
Opens math templates: fraction, root, power and more.
ctrlsymbols
Opens the symbols list.
trig
trig
Opens a menu of trig functions.
=
=
Types the equals sign.
ctrl≠≥▸
Opens relations (not equal, less than, and more).
▼
▼
Moves down, or scrolls forward in history.
▶
▶
Moves the cursor right.
^
^
Raises to a power.
ctrlⁿ√
Builds an nth root template.
x²
x²
Squares the previous value.
ctrl√
Builds a square root.
ln
ln
Natural logarithm (base e).
ctrleˣ
e to a power.
log
log
Base-10 logarithm.
ctrl10ˣ
Ten to a power.
π
π
Types the constant π.
ctrl𝑖
Types the imaginary unit i.
/
/
Builds a fraction template.
sin
sin
Sine of an angle.
ctrlsin⁻¹
Inverse sine.
cos
cos
Cosine of an angle.
ctrlcos⁻¹
Inverse cosine.
tan
tan
Tangent of an angle.
ctrltan⁻¹
Inverse tangent.
(
(
Opens a bracket.
ctrl[
Types a square bracket for matrices.
shift{
Types a left curly brace for lists.
)
)
Closes a bracket.
ctrl]
Types a square bracket for matrices.
shift}
Types a right curly brace for lists.
,
,
Separates items.
ctrl;
Types a semicolon.
x
x
Types the variable x.
ctrl!
Factorial.
7
7
Types 7.
8
8
Types 8.
9
9
Types 9.
÷
÷
Divides.
ctrl|
Types the with bar: a condition after a value.
EE
EE
Times a power of ten.
4
4
Types 4.
5
5
Types 5.
6
6
Types 6.
×
×
Multiplies.
:=
:=
Defines a variable with the := sign.
ctrl→
Stores a value with an arrow.
1
1
Types 1.
2
2
Types 2.
3
3
Types 3.
−
−
Subtracts. Use (−) for a negative number.
0
0
Types 0.
.
.
Decimal point.
ctrl°
Types the degree sign.
(−)
(−)
Negative sign for a number.
ctrlans
Types ans, the last answer.
+
+
Adds.
enter
enter
Evaluates the line and shows the exact answer.
ctrl≈
Evaluates and shows a decimal answer.
a
a
Types the letter a (a variable name).
b
b
Types the letter b (a variable name).
c
c
Types the letter c (a variable name).
d
d
Types the letter d (a variable name).
e
e
Types the letter e (a variable name).
f
f
Types the letter f (a variable name).
g
g
Types the letter g (a variable name).
h
h
Types the letter h (a variable name).
i
i
Types the letter i (a variable name).
j
j
Types the letter j (a variable name).
k
k
Types the letter k (a variable name).
l
l
Types the letter l (a variable name).
m
m
Types the letter m (a variable name).
n
n
Types the letter n (a variable name).
o
o
Types the letter o (a variable name).
p
p
Types the letter p (a variable name).
q
q
Types the letter q (a variable name).
r
r
Types the letter r (a variable name).
s
s
Types the letter s (a variable name).
t
t
Types the letter t (a variable name).
u
u
Types the letter u (a variable name).
v
v
Types the letter v (a variable name).
w
w
Types the letter w (a variable name).
x
x
Types the letter x (a variable name).
y
y
Types the letter y (a variable name).
z
z
Types the letter z (a variable name).
θ
θ
Types the angle symbol θ.
∞
∞
Types the infinity symbol.
␣
␣
Types a space.

Menus and screens

Home
Pick Calculator or Graphs, open Settings, clear history, clear all variables a to z, or reset.
Menu
Grouped tools: Actions, Number, Algebra, Calculus, Probability, Statistics, Matrix and Vector, and Complex.
Actions
Define, delete a variable, := assign, store, the with bar, and clear history.
Number
approx, exact, factor, propFrac, gcd, lcm, mod and similar.
Algebra
solve, factor, expand, zeros, and the complex versions cSolve, cFactor, cZeros.
Calculus
Derivative, integral, definite integral, limit, sum, product and taylor.
Probability and Statistics
Factorial, nCr, nPr, random numbers, normal distribution, mean, median, standard deviation, variance.
Matrix and Vector
Build matrices, determinant, rref, ref, identity, transpose, dot product.
Templates
Pick-from-list shapes: fraction, power, square root, nth root, e power, log with base, absolute value and calculus templates.
Symbols
ctrl then templates: infinity, theta, degree sign, factorial, and comparison signs.
Catalog
All functions in alphabetical order. Press enter to paste one.
Relations
ctrl then = opens equals, not equal, less than, greater than, and similar signs.
Graphs page
doc opens graphs: enter f1(x) to f7(x), press enter or tab to plot. menu there gives window settings, zoom, trace and analyze tools.
Settings
Calculation mode (Auto, Exact, Approximate), angle unit, display digits and real or complex.
Variables
var lists the variables you have stored.

Modes and settings

Calculation mode
Auto keeps exact answers; Approximate gives decimals. ctrl enter gives one decimal answer.
Angle
Radian, Degree or Gradian for trig functions.
Display digits
Float shows needed digits; Fix keeps a set number of decimals.
Real or complex
Real or rectangular complex results.

Tips

Guides for this calculator