Thanks, Daniel, for pointing out this site to me.

It seems, however, that in contrast to StackExchangeMMA Latex is not supported here. Example:

$\sqrt{1+x^2}$

Or am I doing something wrong?

I have gradually become acustomed to using it for better readability in texts.

Regards, Wolfgang

I get an empty plot in Mathemaca 10 running under Linux.

Are you looking for solutions to that equation?

Solve[Exp[x] == Cos[x] && -10 <= x <= 10, x, Reals]

(* Out[90]= {{x -> 0}, {x -> 
   Root[{-E^#1 + Cos[#1] &, -7.8535932799712482001}]}, {x -> 
   Root[{-E^#1 + Cos[#1] &, -4.7212927588476862166}]}, {x -> 
   Root[{-E^#1 + Cos[#1] &, -1.29269571937339838117}]}} *)

Or an iterative process that finds a solution from a starting point. For that one can use e.g. Newton iterations.

FixedPointList[{#[[1]] - f[#[[1]]]/f'[#[[1]]], 
   f[#[[1]]]} &, {-.7, f[-.2]}]

(* Out[112]= {{-0.7, -0.1613358247632598}, {-2.51705989723243, \
-0.268256883493079}, {-0.7474281702634069, 
  0.8919329283107287}, {-2.007816769456799, -0.2598565433504163}, \
{-1.285388510652165, 
  0.5575233413007432}, {-1.292717416706861, -0.005005670608255908}, \
{-1.2926957195615, 0.00001490725795189052}, {-1.292695719373398, 
  1.292351226034327*10^-10}, {-1.292695719373398, \
-5.551115123125783*10^-17}, {-1.292695719373398, \
-5.551115123125783*10^-17}} *)