3 transcendent equations, 2 unknown variables

*To*: mathgroup at smc.vnet.net*Subject*: [mg65870] 3 transcendent equations, 2 unknown variables*From*: "Ronaldo" <mti at abv.bg>*Date*: Thu, 20 Apr 2006 05:14:51 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

HI there, I have 3 independent equations (whose coefficients come from EXPERIMENTAL data). The equations are quite complicated and include trigonometric functions. There are 3 unknown variables. So far, it looks fine, right ? However, there might be multiple solutions (due to the trigonometric functions). And I have no idea what initial values to enter in FindRoot, in order to get the real solutions. Suppose I find a separate method to determine one of the unknown variables. Then it will be nice to be able to use some approximation algorithm to find the other two variables by using not any two, but the three equations together. The problem is that FindRoot do not accept a number of equations different from the number of variables. This could be done in another system, but at the moment I am restricted to Mathematica only (and as you can guess from my question I am a Newbie in Matemathica yet). Thank you for any advice ! R.