Step-By-Step Differentiation - HP -28S Manual

Step-by-Step Differentiation
To differentiate step-by-step, key in the derivative as a expression. For
this example, calculate:
d
- tan
(x
2
+
1)
dx
Before starting the example, clear the stack, select Radians angle
mode, and select STO number display mode .
• 1
CLEAR
I I
=3-:
--------~I
.1
MODE
1
RAO
t:
STO
IiEtlIiaBDIl1:lEllGBo:m:::I
Purge the variable X (if it exists).
c::::J
X
.1
PURGE
1
Now start the expression for the derivative, beginning with the vari-
able of differentiation.
c::::J
.1
d/dx
1
X
rn
Next, key in the expression to be differentiated.
~------------------------,
1
TRIG
1
TAN
X.~
2 [B 1
I
ENTER
1
3:
2:
1:
I
oX<TAN(X
A
2+1))
I
B!3Imm . .
Iit!l!I!iID3IIli1l1:I
This expression represents the derivative, with respect to x, of
tan
(x2
+
1).
Evaluate the expression once.
I
EVALI
The result reflects the chain rule of differentiation:
118 10: Calculus