Re: Trig Solve

*To*: mathgroup at smc.vnet.net*Subject*: [mg72399] Re: [mg72389] Trig Solve*From*: Andrzej Kozlowski <akoz at mimuw.edu.pl>*Date*: Mon, 25 Dec 2006 04:52:24 -0500 (EST)*References*: <200612240840.DAA09996@smc.vnet.net>

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 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" <mathma18@hotmail.com>