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 ex
p
ression at
X=value.y <
DRAW
5:Tangent(
tanh(value)Returns hyperbolic tangent of a real
number, expression, or list. y N
tanh(
tanhL1(value)Returns the hyperbolic arctangent of
a real number, expression, or list. y N
tanhL1(
tcdf(lowerbound,
upperbound,df)Computes the Student-t distribution
probability between lowerbound and
u
pp
erbound 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,
f
re
q
list,con
f
idence level]
(Data list input)
Computes a t confidence interval. † …
TESTS
8:TInterval
TInterval
v
,Sx,n
[,con
f
idence 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(