HP 39g Graphing Calculator - Manual (Page 162)

To find
derivatives in the
Function apiet’s
Symboiic view
To find the derivative of the function in the Function apiet’s
Symbolic view, you define two functions and define the
second function as a derivative of the first function. For
2
example, to differentiate sin(v' ) +
2
cos.v:
1. Access the Function apiet’s Symbolic view and define
FI.
|SYMB||SIN|H[x^(T|
GEJ
2 0 [co^l|T|Bl
i^^^FUNCTIDN SVMeOLIC VIEW*
-'F1=SIN
F3iX>=
F4iM)=
F5(X)=
M'iaiiBWitaMMBB
BHiiiiaiiaiTwi
2. Define F2(X) as the
derivative of F(l).
|d/dx
F l f (
ffl [Til
alpha
)
® CDd)
FUNCTION STMBOUC VIEW*
^F1+2»C0„,
^F2=c)X
F4iX>=
F5CX>=
BTOiBiMilaiiBMiB IMiiiiiiiaanB
3.
4.
Select F2(X) and
evaluate it.
0
imi
* FUNCTION SVHEDUC VIEW^M
-^F1(X>=SIN+2*C0,.,
F3F4F5
w
msiisi
Press MSMfel to display the result. (Use the arrow keys to
view the entire function.)
F
2
(X)=C
0
sCx®).
2
'X+
2
-S INC' F2(X)=C0S(X^)'2'X-2'S I N(X)
HP39G HP 40G
You could also just define
F\{x)=
10-24 Using mathematical functions