Texas Instruments TITANIUM TI-89 User Manual

Page 271

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Symbolic Manipulation

271

•

Use

9 to create a user-defined secant function, where:

•

Use

Define

to create a user-defined function

h(x)

, where:

Multi-Statement vs. Single-Statement Functions

Multi-statement user-defined functions should be used as an argument for numeric
functions (such as

nDeriv

and

nInt

) only.

Then find the limit of

sec(x)

as x

approaches p/4.

Note:

To select

limit

from the Calc toolbar

menu, press

… 3.

Then find a 5th order Taylor polynomial
for

h(x)

with respect to x.

Note:

To select ‰ from the Calc toolbar

menu, press

… 2 (or press 2 < on the

keyboard). To select taylor, press

… 9.

sec

cos

-----------

h x

( )

sin

---------

∫

Define h(x)=

‰

(sin(t)/t,t,0,x).