54
Chapter 3: Math, Calculus, and Test Operations
03MATH.DOC TI-86, Chap 3, US English Bob Fedorisko Revised: 02/13/01 2:19 PM Printed: 02/13/01 3:00 PM Page 54 of 10
03MATH.DOC TI-86, Chap 3, US English Bob Fedorisko Revised: 02/13/01 2:19 PM Printed: 02/13/01 3:00 PM Page 54 of 10
03MATH.DOC TI-86, Chap 3, US English Bob Fedorisko Revised: 02/13/01 2:19 PM Printed: 02/13/01 3:00 PM Page 54 of 10
The CALC (Calculus) Menu
-
†
evalF
nDer
der1
der2
fnInt
4
fMin
fMax
arc
The calculus functions return values with respect to any user-created variable, to built-in
variables
eqn
and
exp
, and to graphing variables such as
x
,
t
, and
q
.
evalF(
expression
,
variable
,
value
)
Returns the value of
expression
with respect to
variable
for a
given variable
value
nDer(
expression
,
variable
ã
,
value
ä
)
Returns an approximate numerical derivative of
expression
with
respect to
variable
for the current variable value or specified
variable
value
der1(
expression
,
variable
ã
,
value
ä
)
Returns the value of the first derivative of
expression
with respect to
variable
for the current variable value or specified variable
value
der2(
expression
,
variable
ã
,
value
ä
)
Returns the value of the second derivative of
expression
with respect
to
variable
for the current variable value or specified variable
value
fnInt(
expression
,
variable
,
lower
,
upper
)
Returns the numerical integral of
expression
with respect to
variable
between
lower
and
upper
boundaries
fMin(
expression
,
variable
,
lower
,
upper
)
Returns the minimum value of
expression
with respect to
variable
between
lower
and
upper
boundaries
fMax(
expression
,
variable
,
lower
,
upper
)
Returns the maximum value of
expression
with respect to
variable
between
lower
and
upper
boundaries
arc(
expression
,
variable
,
start
,
end
)
Returns the length of a segment of a curve defined by
expression
with respect to
variable
between
start
and
end
You must set
Dec
mode to
use the calculus functions.
For
evalF
,
nDer
,
der1
, and
der2
,
variable
can be a real
or complex number or list.
You can use
der1
and
der2
in
expression
. You can use
nDer
once in
expression
.
For
fnInt
,
fMin
, and
fMax
,
lower
<
upper
must be true.
