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Entering complex numbers

Complex numbers in the calculator can be entered in either of the two Cartesian representations, namely, x+iy, or (x,y). The results in the calculator will be shown in the ordered-pair format, i.e., (x,y). For example, with the calculator in ALG mode, the complex number (3.5,-1.2),is entered as:

A complex number„Ü3can also.be entered5‚í\1in the form x+iy.For2`example, in ALG mode, 3.5-1.2iis entered as:

„Ü3.5-5‚í1.2*‚¥`

In RPN mode, these numbers will be entered using the following\`keystrokes:

(Notice that the change-sign keystroke..is entered after the number 1.2 has been entered, in the opposite order as the ALG mode exercise), and

(Notice the need³3to enter.an5apostrophe-before.2*‚typing the number¥`3.5-1.2i in RPN mode).

To enter the unit imaginary number type : (the I key).

Polar representation of a complex number

The polar representation of the complex number 3.5-1 2i, entered above, is obtained by changing the coordinate system to cylindrical or polar (using

function CYLIN). You can find this function in the catalog (

). Press

µ

„¥

‚N

 

before or after using CYLIN

Changing to polar shows, and changing

the angular measure to radians, produces the result:

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Image 73
HP 49g manual Entering complex numbers, Polar representation of a complex number