Operation Manual

1-16 Operating the TI
.
82
8201OPER.DOC TI-82, Chapter 1, English Bob Fedorisko Revised: 02/09/01 12:18 PM Printed:
02/09/01 12:35 PM Page 16 of 22
Last Answer
When an expression is evaluated successfully from the Home screen or from a
program, the TI
.
82 stores the answer to a variable, Ans (Last Answer). Ans may
be a real number, a list, or a matrix. When you turn the TI
.
82 off, the value in Ans
is retained in memory.
Using Ans in an Expression
You can use the variable
Ans
to represent the last answer in most places.
Press
y
ã
ANS
ä
and the variable name
Ans
is copied to the cursor location.
When the expression is evaluated, the TI
.
82 uses the value of
Ans
in the
calculation.
Calculate the area of a garden plot 1.7 meters by 4.2 meters. Then calculate
the yield per square meter if the plot produces a total of 147 tomatoes.
1.7
¯
4.2
Í
147
¥ y
ã
ANS
ä
Í
Continuing an Expression
You can use the value in
Ans
as the first entry in the next expression
without entering the value again or pressing
y
ã
ANS
ä
. On the blank line on
the Home screen, enter the function. The TI
.
82 “types” the variable name
Ans
followed by the function.
5
¥
2
Í
¯
9.9
Í
Storing Answers
To store an answer, store
Ans
to a variable before you evaluate another
expression.
Calculate the area of a circle of radius 5 meters. Then calculate the volume
of a cylinder of radius 5 meters and height 3.3 meters and store in the
variable
V
.
y
ãpä
5
¡
Í
¯
3.3
Í
¿ ƒ
V
Í


