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MathGroup Archive 2011

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Simplify[ArcTan[Tan[a] + Tan[b]]]

  • To: mathgroup at smc.vnet.net
  • Subject: [mg120479] Simplify[ArcTan[Tan[a] + Tan[b]]]
  • From: rych <rychphd at gmail.com>
  • Date: Mon, 25 Jul 2011 07:28:34 -0400 (EDT)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com

Can't Mathematica tell anything about ArcTan[Tan[a] + Tan[b]]? Maybe
there exists no useful identity for that? By useful I mean the
expression with functions of the "angles" a and b other than tangents.
Thanks
Igor




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