HP 48gII Graphing Calculator Manual do Utilizador descarregar pdf (Página 80)

100

101

Page 2-22

™ ~‚2 Enters the factorial for the 3 in the square root

(entering the factorial changes the cursor to the selection cursor)

˜˜™™ Selects the µ in the exponential function

/3*~‚f Modifies exponential function argument

™™™™ Selects ∆y

R Places a square root symbol on ∆y

(this operation also changes the cursor to the selection cursor)

˜˜ ™—— S Select θ

1/3

and enter the SIN function

The resulting screen is the following:

Evaluating a sub-expression

Since we already have the sub-expression

(

)

3/1

θSIN highlighted, let’s press

the @EVAL D soft menu key to evaluate this sub-expression. The result is:

Some algebraic expressions cannot be simplified anymore. Try the following

keystrokes: —D. You will notice that nothing happens, other than the

highlighting of the entire argument of the LN function. This is because this

expression cannot be evaluated (or simplified) any more according to the

CAS rules. Trying the keystrokes: —D again does not produce any

changes on the expression. Another sequence of —D keystrokes,

however, modifies the expression as follows:

One more application of the —D keystrokes produces more changes:

1 2 ... 75 76 77 78 79 80 81 82 83 84 85 ... 863 864

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HP 48gII Graphing Calculator Manual do Utilizador Página 80

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