HP 40gs Manual do Utilizador descarregar pdf (Página 220)

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101

14-38 Computer Algebra System (CAS)

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(X

-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(2X

+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

arccos(x) with − arcsin(x).

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