hp40g+.book Page 38 Friday, December 9, 2005 1:03 AM

SOLVEVX

Solve equations

 

SOLVEVX has as a parameter either:

 

(1) an equality between two expressions in the variable

 

contained in VX, or

 

(2) a single such expression (in which case = 0 is

 

implied).

 

SOLVEVX solves the equation.

 

Example 1

 

Typing:

 

SOLVEVX(X4-1=3)

 

gives, in real mode:

 

(x = −√2) OR (x = √2)

 

or, in complex mode, even if you have chosen X as real:

 

(x = −√2) OR (x = √2) OR (x = −i · √2) OR (x = i√2)

 

Example 2

 

Typing:

 

SOLVEVX(2X2+X)

 

gives, in real mode:

 

(x = −1/2) OR (x = 0)

TRIG menu

 

The TRIG menu contains functions that enable you to

 

transform trigonometric expressions.

ACOS2S

Transform the arccos into arcsin

 

ACOS2S has as a trigonometric expression as an

 

argument.

 

ACOS2S transforms the expression by replacing

 

π

 

arccos(x) with -- − arcsin(x).

 

2

14-38

 

 

Computer Algebra System (CAS)