Texas Instruments TI-86 - The CALC (Calculus) Menu

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 1003MATH.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 1003MATH.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
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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
,
valueä
)
Returns an approximate numerical derivative of
expression
with
respect to
variable
for the current variable value or specified
v
ariable
value
der1(
expression
,
variableã
,
valueä
)
Returns the value of the first derivative of
expression
with respect to
variable
for the current variable value or specified variable
value
der2(
expression
,
variableã
,
valueä
)
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.