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

>

>

>

```

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