Entering Complex Numbers; Note About Radian Versus Degree Mode - Texas Instruments TI-84 Plus Manual Book

On the TI-84 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
returns an answer.
Real mode
$

Entering Complex Numbers

Entering Complex Numbers Entering Complex Numbers Entering Complex Numbers
Complex numbers are stored in rectangular form, but you can enter a complex number
in rectangular form or polar form, regardless of the mode setting. The components of
complex numbers can be real numbers or expressions that evaluate to real numbers;
expressions are evaluated when the command is executed.

Note about Radian Versus Degree Mode

Note about Radian Versus Degree Mode
Note about Radian Versus Degree Mode Note about Radian Versus Degree Mode
Radian mode is recommended for complex number calculations. Internally, the TI-84
Plus converts all entered trigonometric values to radians, but it does not convert values
for exponential, logarithmic, or hyperbolic functions.
Chapter 2: Math, Angle, and Test Operations
L
returns an error; in
ln( 1)
mode
a+bi
$
L
mode
a+bi ln( 1)
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