HP 39gs_40gs_Mastering The Graphing Calculator_English_E_F2224-90010

Algebraic differentiation is most easily handled in the
SYMB view of Function. The best method is to define
your function as
F1(X) and its derivative as F2(X) (see below)…
press
Calculator Tip
Doing your differentiation in the Function aplet is much easier and offers
the additional advantage of being able to graph the two functions.
Circular functions
There are two issues that influence the graphing of circular functions,
both related to the scale chosen.
The first one, illustrated on the right, causes
circles to be ellipses if you don’t choose scales
for the x and y axes which are ‘square’ relative
to each other. The two graphs above are both
2
of the same function
x
2
+ y = 9 .
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