VI. Menu Keys

    B. F2:Algebra

This toolbar menu contains several commonly used algebraic functions. This menu is also available from the MATH menu. You may need to
clear the value of any variable that you are going to use unless you need for the variable to have a particular value during the execution of the process.

Not all options are given in the entry format. Options that are used frequently will be included, but others are omitted from the table. For a complete format listing, you can check the TI-89 manual. They can be found in the manual.

Menu Item &
Entry Format
Description
Example
Example
1:solve
solve(equation, var)
This solves an expression for a specific
variable. It returns only real solutions.
More examples are at
II. Basic Calculations, E.
2:factor
factor(expression1)

This will factor an expression with
respect to all variables or only a
specified variable.

3:expand
expand(expression1)
This will expand an expression with
respect to all variables or only a
specified variable.
4:zeros
zeros(expression, var)
This will determine the value(s) of a
specified variable that will make an
expression equal to zero.
5:approx
approx(expression)
This will evaluate an expression using
floating-point arithmetic, where
possible. Equivalent to APPROXIMATE
mode
.
6:comDenom
comDenom(expression)
This will calculate a common denominator
for all the terms in an expression and
changes the expression into a
reduced fraction.
7:propFrac
propFrac(expression, var)
This will return an expression as a
proper expression.
8:nSolve
nSolve(equation,varOrGuess)
Calculates one solution for an equation as
a floating-point number. You can use
the "with" operator to constrain the
search to a particular interval, or
you can indicate a value close to a
particular solution.
9:Trig 1:tExpand
tExpand(expression)
This will expand a trig expression with
angle sums and multiple angles. This is
useful when working with trigonometric
identities.
9:Trig 2:tCollect
tCollect(expression)
This will collect the products of integer
powers of trig functions into angle sums
and multiple angles. This is the opposite
of tExpand.
A:Complex 1:cSolve
cSolve(equation, var)
These are just like solve, factor, and
zeros, but they will also compute
complex results.
A:Complex 2:cFactor
cFactor(expression1)
A:Complex 3:cZeros
cZeros(expression, var)
B:Extract 1:getNum
getNum(expression)
Applies the comDenom operation and
returns the resulting numerator.
B:Extract 2:getDenom
getDenom(expression)
Applies the comDenom operation and
returns the resulting denominator.
B:Extract 3:left
left(equation)
This returns the left-hand side of an
equation or inequality.
B:Extract 3:right
right(equation)
This returns the right-hand side of an
equation or inequality.

 

   

   

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