HP 15C Instrukcja Użytkownika Pobierz pdf (Strona 195)

Section 14: Numerical Integration 195

In Run mode:

Key the lower limit of integration (a) into the X-register, then press

v to lift it into the Y-register.

Key the upper limit of integration (b) in to the X-register.

Press ´ f followed by the label of your subroutine.

Example: Certain problems in physics and engineering require calculating

Bessel functions. The Bessel function of the first kind of order 0 can be

expressed as





)sin ( cos

)( dθθxxJ

Find





)(sin cos

(1) dθθJ

In Program mode, key in the following subroutine to evaluate the function

f(θ) = cos (sin θ).

Keystrokes

Display

|¥

000–

Program mode.

´ CLEAR M

000–

Clear program memory.

´b 0

001–42,21, 0

Begin subroutine with a

b instruction.

Subroutine assumes a

value of θ is in X-register.

[

002– 23

Calculate sin θ.

003– 24

Calculate cos (sin θ).

004– 43 32

Now, in Run mode key the lower limit of integration into the Y-register and

the upper limit into the X-register. For this particular problem, you also

need to specify Radians mode for the trigonometric functions.

1 2 ... 190 191 192 193 194 195 196 197 198 199 200 ... 287 288

Brak uwag

HP 15C Instrukcja Użytkownika Strona 195