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Help with Solve

  • To: mathgroup at smc.vnet.net
  • Subject: [mg112323] Help with Solve
  • From: Eduardo Cavazos <wayo.cavazos at gmail.com>
  • Date: Thu, 9 Sep 2010 04:23:30 -0400 (EDT)

Hello!

A newb question I'm sure... :-)

Here's a couple of equations:

eq1 = n*Sin[x] == (m*v^2)/r;
eq2 = n*Cos[x] == m*g;

The goal is to solve for 'x'.

I can do this in a roundabout way via:

    Solve[eq1 /. Solve[eq2, n], x]

I.e. solve eq2 for 'n', substitute this into eq1, and solve the result
for 'x'. But this approach seems too "manual".

Is there a more straightforward way to carry out the problem? I tried
this:

    Solve[{eq1, eq2}, x]

but it doesn't seem to work. What's a good way to go about this?

Thanks!

Ed


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