Equal, Conjugate, Opposite and Reciprocal Complex Numbers

Equal Complex Numbers
Two complex numbers are equals if they have the same modulus and argument.
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Conjugate Complex Numbers
Two complex numbers are conjugates if they have the same modulus but opposite arguments.
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Opposite Complex Numbers
Two complex numbers are opposites if they have the same modulus and its arguments differ in π radians.

Reciprocal Complex Numbers
The reciprocal of a non-zero complex number has as a modulus the reciporcal and for its argument, the opposite.
