calc: Complex Formats
7.7.4 Complex Formats
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There are three supported notations for complex numbers in rectangular
form. The default is as a pair of real numbers enclosed in parentheses
and separated by a comma: ‘(a,b)’. The ‘d c’ (‘calc-complex-notation’)
command selects this style.
The other notations are ‘d i’ (‘calc-i-notation’), in which numbers
are displayed in ‘a+bi’ form, and ‘d j’ (‘calc-j-notation’) which
displays the form ‘a+bj’ preferred in some disciplines.
Complex numbers are normally entered in ‘(a,b)’ format. If you enter
‘2+3i’ as an algebraic formula, it will be stored as the formula ‘2 + 3
* i’. However, if you use ‘=’ to evaluate this formula and you have not
changed the variable ‘i’, the ‘i’ will be interpreted as ‘(0,1)’ and the
formula will be simplified to ‘(2,3)’. Other commands (like ‘calc-sin’)
will _not_ interpret the formula ‘2 + 3 * i’ as a complex number. 
Variables, under “special constants.”
Info Catalog
calc: Float Formats
calc: Display Modes
calc: Fraction Formats