fx-9860GII TI-83
Conj
On a Casio calculator you can obtain a complex conjugate
CPLX Conj OPTN F3 F4
or via the catalog as
conjg
The result of the conjugate calculation differs in accordance with the SET UP Complex Mode real, a+bi, r∠θ.
Example 1
To calculate the conjugate for the complex number 2 + 4i
Conj i ≣ Conjg ( 2 + 4 ≣ ) EXE Conjg (2+4i) 2−4i