Texas Instruments PLUS TI-89 - Manual (Page 68)

Chapter 2: Operating the Calculator 51
02OPER DOC TI-89/TI-92 Plus: Operating the TI-89/TI-92 Plus (English) Susan Gullord Revised: 02/23/01 1:06 PM Printed: 02/23/01 2:11 PM Page 51 of 44
Each time you evaluate an expression, the TI -89 / TI-92 Plus stores the
answer to the variable ans(1) . To insert this variable in the entry line,
press 2 ±.
For example, calculate the area of a garden plot that is 1.7 meters by
4.2 meters. Then calculate the yield per square meter if the plot
produces a total of 147 tomatoes.
1. Find the area.
1.7 p 4.2 ¸
2. Find the yield.
147 e 2 ± ¸
Just as ans(1) always contains the last answer, ans(2) , ans(3) , etc.,
also contain previous answers. For example, ans(2) contains the
next-to-last answer.
Recalling the Last
Answer
Note: Refer to ans() in
Appendix A.
Variable ans(1) is
inserted, and its value is
used in the calculation.