Section 8 - Integration St - Texas Instruments TI-60 Owner's Manual

CHAPTER 1-8
INTEGRATION
Section 8 — Integration
Definite integrals can be calculated using Simpson's Rule, which is
described In Appendix C An Integral can be thought of as the area under a
curve The calculator finds the approximate areas under portions of the
curve and adds them together The more portions under the curve, the more
accurate the answer, but the more time It takas
rrari
— Integration key
The L/d* ! key finds the definite integral of a function, which must be
entered as a program
Use the following procedure to enier a function.
1 Partition the calculator's memory so that It Includes at least three data
memories If fewer than three data memories are available, pressing
\M. causes an error condition
2 Enter the learn mode and program the function to be Integrated.
— Do not store any values in data memories 0,1 or 2 within the program
The calculator uses these data memories to perform the Integration
— For each occurence of the integration vanable, use a RCt 1
instruction It your function begins with the variable, you can omit
RCL
[T]
at the start ot the program , the integration argument is
automatically recalled from data memory 1 at the beginning of each
integration interval.
— End the function with EOS® (Do not use any other JEE
Instructions in the program )
3. Leave tha learn Mode
After entering the function in program memory, follow the steps below to
find the definite integral
1 Enter the lower limit In data memory t and upper limit in data memory 2.
2. Press -dx , . The calculator prompts you to enter the number of
integration intervals you want to use.
3. Enter any number up to 99. according to the desired accuracy and
calculation time This number must be a decimal value, regardless ol the
current number system
4. Press ifOS] .
The integration Is figured according to Simpson's Rule Al the end ol (he
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