hp40g+.book Page 45 Friday, December 9, 2005 1:03 AM

CAS Functions on the MATH menu

When you are in the

 

Equation Writer and press

 

, a menu of

 

additional CAS functions

 

available to you is

 

displayed. Many of the

 

functions in this menu

 

match the functions available from the soft-key menus in

the Equation Writer; but there are other functions that are

only available from this menu. This section describes CAS

functions that are available when you press

in the

Equation Writer (grouped by main menu name).

 

Algebra menu

 

All the functions on this menu are also available on the

 

menu in the Equation Writer. See “ALGB menu”

 

on page 14-10 for a description of these functions.

Complex menu

 

i

Inserts i (= –1).

ABS

Determines the absolute value of the argument.

 

Example

 

Typing ABS(7 + 4i) yields 65 , as does ABS(7 – 4i).

ARG

See “ARG” on page 13-7.

CONJ

See “CONJ” on page 13-7.

DROITE

DROITE returns the equation of the line through the

 

 

Cartesian points, z1, z2. It takes two complex numbers, z1

 

and z2, as arguments.

 

Example

 

Typing:

 

DROITE((1, 2), (0, 1))

 

or:

 

DROITE(1 + 2·i, i)

Computer Algebra System (CAS)

14-45