Section 11: Calculating With Complex Numbers 127

Entering Complex Numbers with −. The clearing functions − and

`can also be used with } as an alternative method of entering (and clearing) complex numbers. Using this method, you can enter a complex number using only the X-register, without affecting the rest of the stack. (This is possible because − and ` disable stack lift.) Executing } will also create an imaginary stack if one is not already present.

Example: Enter 9 + 8i without moving the stack and then find its square.

KeystrokesDisplay

(−)(0.0000)

8

8

´}

7.0000

−

0.0000

9

9

Prevents stack lift when the next digit (8) is keyed in. Omit this step if you'd rather save what's in X and lose what's in T.

Enter imaginary part first.

Displays real part; Complex mode activated.

Disables stack. (Otherwise, it would lift following }.)

Enters real part (digit entry not terminated).

x

 

 

 

 

17.0000

Real part.

 

 

 

 

´%(hold)

 

 

144.0000

Imaginary part.

 

 

 

 

(release)

17.0000

 

 

 

 

 

 

 

 

 

Re

Im

 

Re

Im

 

Re

Im

Re

Im

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

T

 

a

 

b

 

 

a

b

 

a

 

b

 

a

b

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Z

 

c

 

d

 

 

c

d

 

c

 

d

 

c

d

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y

 

e

 

f

 

 

e

f

 

e

 

f

 

e

f

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X

 

4

 

7

 

 

0

7

 

8

 

7

 

7

8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Keys:

 

 

 

 

−

 

 

 

8

 

 

´}