HP 48G Series Quick Start Manual page 42

Example: Find the square roots of 8 — 61.
Step 1: Type the complex number.
@(1) 8 GEO 6 GO) (8 -6)
AMAT[EMAT] +2 [30m] |[APPLY]
Step 2: Find the principal square root and make an extra copy.
: i
FTETI
Step 3: Find the conjugate root.
(MTH) (NXT) CHFL (NXT) 2 (3-1)
)
Algebraics containing complex numbers can be manipulated
symbolically in the same way as real-number expressions.
Example: Calculate the sine of (.6,2).
QO @&() s@L)2 1: os 12429545641,
993377649)
EBA) [SIGN]NEG[CONJ]|||
Example: Use the EquationWriter application to enter an expression
representing the complex number 2 — 2iv/3. Then evaluate
the expression to get a complex result.
Step 1: Enter the expression.
Step 2: Convert the expression to a number.
& (uv) 1: (2,-3.46418161514)
EIENITER(CNII
3-12 Arithmetic