Symbolic Manipulation
233
How Long Is the Simplification Process?
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.)
Delayed Simplification for Certain Built-In Functions
Usually, variables are automatically simplified to their lowest possible level before they
are passed to a function. For certain functions, however, complete simplification is
delayed until after the function is performed.
•
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)
2
+ cos(x)
2
= 1
No key cancellation
Summary of Contents for Titanium TI-89
Page 9: ...Getting Started 6 TI 89 Titanium keys Ë Ì Í Ê ...
Page 34: ...Getting Started 31 2 or D 2 B u s i n e s s D B D B Press Result ...
Page 43: ...Getting Started 40 3 0 D B D D B D Press Result ...
Page 44: ...Getting Started 41 D 2 0 0 2 D B Scroll down to October and press Press Result ...
Page 58: ...Getting Started 55 Example Set split screen mode to TOP BOTTOM Press Result 3 B D ...
Page 70: ...Getting Started 67 ...
Page 175: ...Operating the Calculator 172 From the Keyboard ...
Page 456: ...Tables 453 ...
Page 527: ...Data Matrix Editor 524 ...
