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

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 II =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