MathGroup Archive 1999

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Rationalizing the denominator

  • To: mathgroup at
  • Subject: [mg18633] Rationalizing the denominator
  • From: "Drago Ganic" <drago.ganic at>
  • Date: Tue, 13 Jul 1999 01:01:44 -0400
  • Organization: HiNet
  • Sender: owner-wri-mathgroup at

How can I get


instead of


as a result for Sin[Pi/4].

When it comes to complex numbers Mathematica never returns 1/I - she always
returns -I.
Why is the behaviour for irrationals different ?

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