HP 40gs User Manual page 176

To find derivatives
in the Function
aplet's Symbolic
view
13-22
differentiation function substitutes the value that X holds,
and returns a numeric result.
For example, consider the function:
2
( x ( )
dx sin + 2 cos
1. Enter the differentiation function onto the command
line, substituting S1 in place of X.
2
2. Evaluate the function.
3. Show the result.
To find the derivative of the function in the Function aplet's
Symbolic view, you define two functions and define the
second function as a derivative of the first function. For
example, to differentiate
1. Access the Function aplet's Symbolic view and define
F1.
2
2. Define F2(X) as the
derivative of F(1).
x ( ) )
S1
S1
S1
2
( )
sin x + 2
Using mathematical functions
cos x
: