Texas Instruments PLUS TI-89 - Manual (Page 82)

Chapter 3: Symbolic Manipulation 65
03SYMBOL.DOC TI-89/TI-92 Plus: Symbolic Manipulation (English) Susan Gullord Revised: 02/23/01 10:52 AM Printed: 02/23/01 2:12 PM Page 65 of 24
¦ Identities involving zeros and ones
are exploited.
¦ Polynomial greatest common
divisors are canceled.
¦ Polynomials are expanded unless
no key cancellation can occur.
¦ Common denominators are
formed unless no key cancellation
can occur.
¦ Functional identities are
exploited. For example:
ln(2x) = ln(2) + ln(x)
and
sin(x) ñ + cos(x) ñ = 1
Depending on the complexity of an entry, result, or intermediate
expression, it can take a long time to expand an expression and
cancel common divisors as necessary for simplification.
To interrupt a simplification process that is taking too long,
press ´. You can then try simplifying only a portion of the
expression. (Auto-paste the entire expression on the entry line, and
then delete the unwanted parts.)
How Long Is the
Simplification
Process?
This floating-point number
causes numeric results to
be shown as floating-point.
If a floating-point whole
number is entered as an
exponent, it is treated as
an integer (and does not
produce a floating-point
result).
No key cancellation
No key cancellation