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
>
>
>