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MathGroup Archive 2006

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Re: Trig Solve

  • To: mathgroup at
  • Subject: [mg72399] Re: [mg72389] Trig Solve
  • From: Andrzej Kozlowski <akoz at>
  • Date: Mon, 25 Dec 2006 04:52:24 -0500 (EST)
  • References: <>

On 24 Dec 2006, at 17:40, Narasimham wrote:

> Could not get solution for easier implicit trig. relation
> Solve[{x, y} == {Cos[th]*(3 + Cos[th/2 + v]), (3 + Cos[th/2 +
> v])*Sin[th]}, {th, v}, {x, y}]
> Thanks in advance for indication for solutions.
> Narasimham

It is completely unclear to me what you mean be a "solution" to this  
equation. What are you trying to "solve' in terms of what?
Note that the code you have written is actually telling Solve to  
eliminate x and y


Solve[eqns, vars] attempts to solve an equation or set of
equations for the variables vars. Solve[eqns, vars, elims] attempts  
to solve
the equations for vars, eliminating the variables elims.

which is obviously impossible.

Andrzej Kozlowski

  • References:
    • Trig Solve
      • From: "Narasimham" <>
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