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A very difficult equation ...
*To*: mathgroup at smc.vnet.net
*Subject*: [mg14063] A very difficult equation ...
*From*: tobi.kamke at t-online.de (Julia Kamke)
*Date*: Sat, 19 Sep 1998 03:41:59 -0400
*Sender*: owner-wri-mathgroup at wolfram.com
Hi!!!
f[x_] := -2 + 2 * Cos[x] + x * Sin[x]
How can I solve the equation f[x] == 0 in a symbolic way? Solve[f[x] ==
0, x] says, that it isn't possible to solve this equation! Furthermore
I can't simplify this equation. But I think, that x = z * 2 * Pi (z =
.. -2, -1, 0, 1, 2 ...) are some of the possible solutions. Is there a
trick or a possibility to find out this solutions and the rest of all
solutions with Mathematica??
Please help me!!!
Thanks,
Tobi
P. S. Is f[x] == Sin[x](Sin[x](x^2 + 4) - 4x)??? How can I find this out
with Mathematica??
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