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I have now been working for a couple of days on the following system without finding any real clue...

Could someone give me a help?

If there wouldn't be any mathematical way to solve (we never know), could someone detail me how to solve it programmatically?

In advance, many thanks

Didier

-x + y + z + 2A sin(y-z) = C

-x + y - z + 2A sin(x-z) = C

x + y - z + 2A sin(x-y) = C

where A, C are constant and A, x, y, z arenot equalto 0

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