Solution 11837: Difference Between Complex Numbers on the TI-89 Family, TI-92 Family, or Voyage™ 200 Graphing Calculators.
Are complex numbers handled differently on the TI-89 family, TI-92 family, and Voyage 200?The TI-92 and the TI-89 family/TI-92 Plus/Voyage 200 differ in the way polar form complex numbers are handled.
The TI-92 accepts the form r*eiq and must be in radian mode. If entering a degree value, the degree symbol must be used. The q value in the result would be a radian measure, and it must be manually scaled by 180/p to get a degree measure.
The TI-89, TI-92 Plus, and Voyage 200 can accept the more common (r < q) form of polar complex numbers and also are able to return q values as a degree measure.