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Simultaneous equation solve taking ages

  • To: mathgroup at smc.vnet.net
  • Subject: [mg114346] Simultaneous equation solve taking ages
  • From: Peter Bone <peterbone at gmail.com>
  • Date: Wed, 1 Dec 2010 02:15:01 -0500 (EST)

I'm trying to execute this solve. I ran it for 5 hours and it hasn't
finished yet. Will this ever finish? Why is it taking so long?

Solve[a^2 == d^2 + f^2 - 2*d*f*x && b^2 == e^2 + f^2 - 2*e*f*y && c^2
== d^2 + e^2 - 2*d*e*z, {d, e, f}]

I haven't used Mathematica much before so I'm not sure I've done it
correctly. This is for a geometrical problem involving 3 cosine rule
equations. a, b, c, x, y, z are known. Trying to find d, e, f in terms
of the knowns.

Pete


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