Re: Solving periodic functions

*To*: mathgroup at smc.vnet.net*Subject*: [mg74959] Re: Solving periodic functions*From*: dh <dh at metrohm.ch>*Date*: Fri, 13 Apr 2007 01:56:04 -0400 (EDT)*References*: <evkroh$o0k$1@smc.vnet.net>

Hi David, your example is trivial: 6Cos[x]-5Cos[x]== Cos[x]==0. However, you probably meant to write something more sophisticated, like e.g. Sin[x]-Cos[x]==0. These are transcendental functions and are by no means elementary. Especially if you want all the solutions. You can try e.g. Reduce: Reduce[{ Sin[x]==Cos[x]},x] Daniel David Rees wrote: > This is probably totally elementary, but I'm stumped nonetheless. > > Anyway, in Mathematica, how do I solve an equation with multiple periodic > functions within a given function domain bound? > > i.e. How would I find all values of x given 6Cos[x]-5Cos[x] = 0 where > 0<x<=2Pi ? > > thanks > > >