HP 33s hp 33s_user's manual_English_E_HDPM20PIE56.pdf - Page 219

Using Integration in a Program

Page 219 highlights

Example: Program Using Equation. The sine integral function in the example in chapter 8 is Si(t) = ³ t 0 ( sin x )dx x This function can be evaluated by integrating a program that defines the integrand:   Defines the function.  1%2ª% The function as an expression. (Checksum and length: 0EE0 8).  ! Ends the subroutine Checksum and length of program: BDE3 17 Enter this program and integrate the sine integral function with respect to x from 0 to 2 (t = 2). Keys: (In RPN mode) Display: Description: Ÿ {} |W S 0‘2 | X Ÿ {}   _ Selects Radians mode. Selects label S as the integrand. Enters lower and upper limits of integration. Integrates function from 0 to 2; displays result. Restores Degrees mode. Using Integration in a Program Integration can be executed from a program. Remember to include or prompt for the limits of integration before executing the integration, and remember that accuracy and execution time are controlled by the display format at the time the program runs. The two integration instructions appear in the program as: / label Solving and Integrating Programs 14-9

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Solving and Integrating Programs
14–9
Example:
Program Using Equation.
The sine integral function in the example in chapter 8 is
=
t
0
dx
(
Si(t)
)
x
x
sin
This function can be evaluated by integrating a program that defines the
integrand:
Defines the function.
The function as an expression. (Checksum and length:
0EE0
8).
Ends the subroutine
Checksum and length of program: BDE3
17
Enter this program and integrate the sine integral function with respect to
x
from 0
to 2 (
t
= 2).
Keys:
(In RPN mode)
Display:
Description:
{
}
Selects Radians mode.
S
Selects label
S
as the integrand.
0
2
_
Enters lower and upper limits of
integration.
X
Integrates function from 0 to 2;
displays result.
{
}
Restores Degrees mode.
Using Integration in a Program
Integration can be executed from a program. Remember to include or prompt for
the limits of integration before executing the integration, and remember that
accuracy and execution time are controlled by the display format at the time the
program runs. The two integration instructions appear in the program as:
label