Name

Keys and Description

Page

¼

 

 

 

 

 

 

TAN

UTangent. Returns tan x.

4–3

1

TANH

{UHyperbolic

4–6

1

 

tangent.

 

 

 

 

 

 

Returns tanh x.

 

 

VIEW variable

Švariable

3–3

 

 

Displays the labeled contents of

12–13

 

 

variable without recalling the

 

 

 

value to the stack.

 

 

X

Evaluates the displayed equation.

6–12

 

XEQ label

Xlabel

13–2

 

 

Executes the program identified

 

 

 

by label.

 

 

 

 

 

x2

!Square of x.

4–2

1

x3

{$Cube of x.

4–2

1

x

#Square root of x.

4–2

1

3 x

{@Cube root of x.

4–2

1

X y

The xth root of y.

4–2

1

x

{

 

}

11–4

1

º

 

Returns the mean of x values:

 

 

 

Σ xi ⎟ n.

 

 

 

 

 

xˆ

{ ˆ }

11–10

1

 

º

 

 

 

Given a y–value in the X–register,

 

 

 

returns the x–estimatebased on

 

 

 

the regression line: xˆ = (y – b) ⎟

 

 

 

m.

 

 

 

 

 

x!

{Factorial (or gamma).

4–14

1

 

Returns (x)(x – 1) ... (2)(1), or Γ (x

 

 

 

+ 1).

 

 

 

 

 

XROOT

The argument1 root of

6–15

2

 

argument2.

 

 

Operation Index G–17