Re: TI-92 Multiplying vectors

To: CALC-TI@LISTS.PPP.TI.COM
Subject: Re: TI-92 Multiplying vectors
From: Roman Schmied <Roman.Schmied@SWITZERLAND.ORG>
Date: Sun, 15 Feb 1998 20:24:21 +0100
Organization: EPFL
References: <19980213.194201.795614.NETNEWS@AUVM.AMERICAN.EDU>
Reply-To: Roman Schmied <Roman.Schmied@SWITZERLAND.ORG>
Xref: paladin.american.edu bit.listserv.calc-ti:20734

Nathan Lyon wrote:
>
> I need to multiply and divide complex numbers.  Using e^ixx gives
> unpredictable results.  Using [ x, y] vectors will not allow me to multiply
> or divide vectors.  Does anybody know how to use vectors like this on the
> TI-92?  The instruction manual was of little help.

some hints:
- try using brackets: e^(i*xx)
- did you take the right i? the one in yellow above the I key?
- try the format x+iy, for example: (2+3i)*(5+8i), but the Euler
  notation with the e^ works as well
- thou shalt not divide by a vector!! I mean, the result of a
  division by a vector is not defined, so why would you want to
  divide vectors?
- for vectors: I don't have my TI-92 on me (rare, but happens),
  but I think there were DotP and VectorP functions somewhere -
  check in the Catalog menu. With these you could multiply vectors.

So long,
        Roman.

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