HP 15C Instrukcja Użytkownika Pobierz pdf (Strona 132)

132 Section 11: Calculating With Complex Numbers

Conditional Tests

For programming, the four conditional tests below will work in the complex

sense: ~ and T 0 compare the complex number in the (real and

imaginary) X-registers to 0 + 0i, while T 5 and T 6 compare the

complex numbers in the (real and imaginary) X- and Y-registers. All other

conditional tests besides those listed below ignore the imaginary stack.

~ T 0  T 5 (x = y) T 6 

Example: Complex Arithmetic. The characteristic impedance of a ladder

network is given by an equation of the form

Z 

where A and B are complex numbers. Find Z

for the hypothetical values

A = 1.2 + 4.7i and B = 2.7 + 3.2i.

Keystrokes

Display

1.2 v 4.7 ´ V

1.2000

Enters A into real and

imaginary X-registers.

2.7 v 3.2 ´ V

2.7000

Enters B into real and

imaginary X-registers,

moving A into real and

imaginary Y-registers.

1.0428

Calculates A/B.

1.0491

Calculates Z

and

displays real part.

´ % (hold)

0.2406

Displays imaginary part

of Z

while % is held

down.

(release)

1.0491

Again displays real part

of Z

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HP 15C Instrukcja Użytkownika Strona 132