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Sharp EL-9900 User Manual

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79

Chapter 5: Advanced Calculations — Advanced Keyboard

2 real(

real(

complex number)

Returns the real part

of a complex number

(or list of complex

numbers).

3 image(

image(

complex number)

Returns the imagi-

nary part of a

complex number (or

list of complex

numbers).

4 abs(

abs(

complex number)

Returns the absolute

value of a complex

number (or list of

complex numbers).

5 arg(

arg(

complex number)

Takes the coordi-

nates (x

+

yi), and

returns the

θ.

Calculations using complex numbers

To calculate using complex numbers, select the sub-menu item 4

x ± yi

or 5

r

θ in the F ANSWER of the SETUP menu items.

The initial screen for the complex number calculation mode is the

same as for the real number mode.

Complex numbers can be noted using either 4 x ± yi (rectangular

coordinates) or 5

r

θ (polar coordinates).