Texas Instruments TI-83 PLUS User Manual
Page 690
TI-83 Plus
Tables and Reference Information
687
Function or Instruction/
Arguments
Result
Key or Keys/
Menu or Screen/Item
Tangent(
expression
,
value
)
Draws a line tangent to
expression
at
X=
value
.
y
<
DRAW
5:Tangent(
tanh(
value
)
Returns hyperbolic tangent of a real
number, expression, or list.
y
N
tanh(
tanh
L
1
(
value
)
Returns the hyperbolic arctangent of
a real number, expression, or list.
y
N
tanh
L
1
(
tcdf(
lowerbound
,
upperbound
,
df
)
Computes the Student-
t
distribution
probability between
lowerbound
and
upperbound
for the specified degrees
of freedom
df
.
y
=
DISTR
5:tcdf(
Text(
row
,
column
,
text1
,
text2
,...,
text n
)
Writes
text
on graph beginning at
pixel (
row
,
column
), where
0
row
57 and 0
column
94.
y
<
DRAW
0:Text(
Then
See
If:Then
Time
Sets sequence graphs to plot with
respect to time.
†
y
.
Time
TInterval
[
listname
,
freqlist
,
confidence level
]
(Data list input)
Computes a
t
confidence interval.
†
…
TESTS
8:TInterval
TInterval
v
,
Sx
,
n
[,
confidence level
]
(Summary stats input)
Computes a
t
confidence interval.
†
…
TESTS
8:TInterval
tpdf(
x
,
df
)
Computes the probability density
function (pdf) for the Student-
t
distribution at a specified
x
value with
specified degrees of freedom
df
.
y
=
DISTR
4:tpdf(