TI-83 Plus Math, Angle, and Test Operations 84
Entering and Using Complex Numbers
Complex-Number Modes
The TI-83 Plus displays complex numbers in rectangular form and polar
form. To select a complex-number mode, press z, and then select
either of the two modes.
• a+bi (rectangular-complex mode)
• re^qi (polar-complex mode)
On the TI-83 Plus, complex numbers can be stored to variables. Also,
complex numbers are valid list elements.
In Real mode, complex-number results return an error, unless you
entered a complex number as input. For example, in Real mode ln(L1)
returns an error; in a+bi mode ln(L1) returns an answer.