tan(value)

Returns the tangent of a real number, expression, or list.

tanL1(value)

Returns the arctangent of a real number, expression, or list.

Tangent(expression,value[,color#,linestyle#])

Draws a line tangent to expression at X=value with specified color #: 10-24 and line style linestyle #: 1-2.

Color#: 10 - 24 or color name pasted from [vars] COLOR.

tanh(value)

Returns hyperbolic tangent of a real number, expression, or list.

tanhL1(value)

Returns the hyperbolic arctangent of a real number, expression, or list.

tcdf(lowerbound,upperbound,df)

Computes the Student-t distribution probability between lowerbound and upperbound for the specified degrees of freedom df.

Text(row,column,text1,text2,...,text n)

Writes text on graph beginning at pixel (row,column), where 0  row  164 and 0  column  264.

Full mode, row must be <=148; column must be 256

Horiz mode, row must be row<=66 and column must be <=256

G-T mode, row must be row <=126; column must be 176

TextColor([color#]

Set text color prior to using the Text( command.

Color#: 10 - 24 or color name pasted from [vars] COLOR.

Then
See If:Then

Thick

Resets all Y=editor line-style settings to Thick.

Thin

Resets all Y=editor line-style settings to Thin.

Time

Sets sequence graphs to plot with respect to time.

timeCnv(seconds)

Converts seconds to units of time that can be more easily understood for evaluation. The list is in {days,hours,minutes,seconds} format.

TInterval [listname,freqlist,confidence level]
(Data list input)

Computes a t confidence interval.

TInterval v,Sx,n[,confidence level]
(Summary stats input)

Computes a t confidence interval.

toString((value[,format])

Converts value to a string where value can be real, complex, an evaluated expression, list, or matrix. String value displays in classic format (0) following the mode setting AUTO/DEC or in decimal format (1).

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.

Trace

Displays the graph and enters TRACE mode.

T-Test m0[,listname,freqlist,alternative,drawflag,color#])
(Data list input)

Performs a t test with frequency freqlist. alternative=L1 is <; alternative=0 is ƒ; alternative=1 is >. drawflag=1 draws results; drawflag=0 calculates results.

Color#: 10 - 24 or color name pasted from [vars] COLOR.

T-Test m0,v,Sx,n[,alternative,drawflag,color#])

Performs a t test with frequency freqlist. alternative=L1 is < ; alternative=0 is ă; alternative=1 is >. drawflag=1 draws results; drawflag=0 calculates results.

Color#: 10 - 24 or color name pasted from [vars] COLOR.

tvm_FV[(Ú,æ,PV,PMT,P/Y,C/Y)]

Computes the future value.

tvm_æ[(Ú,PV,PMT,FV,P/Y,C/Y)]

Computes the annual interest rate.

tvm_Ú[(æ,PV,PMT,FV,P/Y,C/Y)]

Computes the number of payment periods.

tvm_Pmt[(Ú,æ,PV,FV,P/Y,C/Y)]

Computes the amount of each payment.

tvm_PV[(Ú,æ,PMT,FV,P/Y,C/Y)]

Computes the present value.