[TI nspire] How to get the limit for a complex number

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http://forum.allaboutcircuits.com – Hi again and here the 2nd part: It seems now that I have to calculate residua that the moment I want to have a limit towards, let's say -j0.1, it's not "in the domain". Does somebody know how to do such a thing on this device? Oh wait, the only part that makes difficulties is where the limit of e^(j0.1t) goes towards j0.1..? Update: My problem was that I had degree instead of radian as document format.. (Embedded)