FindRoot, suppressing complex interval-numbers

*To*: mathgroup at smc.vnet.net*Subject*: [mg70870] FindRoot, suppressing complex interval-numbers*From*: "Paul" <pw23 at gmx.net>*Date*: Mon, 30 Oct 2006 05:32:57 -0500 (EST)

Hello, I have the following problem: Take the simple example FindRoot[Sin[x] +2, {x, 1.656 10^8, 1.653 10^8, 1.658 10^8}, EvaluationMonitor :> AppendTo[xs, x]] In the Help we can read: "FindRoot[lhs==rhs, {x, a, a_min, a_max}] searches for a solution, stopping the search if x ever gets outside the range a_min to a_max. " But when I display xs I can see, that there are also two complex numbers used. This is a problem if I use a function (in my case a compiled one) inside FindRoot, which only accepts real numbers. So how can I suppress the using of complex numbers in FindRoot? Best regards, Paul (Mathematica 5.2)