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Question: System of nonlinear equations 2x2

Question:System of nonlinear equations 2x2

one man 1330 Maple
nonlinear ssystem
April 21 2024
2

The question is not at all from me, but, probably, one might say, from the authors of this publication.  interesting_system.pdf

Just for fun.
Find all real solutions to this 2x2 system of nonlinear equations in any given domain. 

f1:=x1-x1*sin(x1+5x2)-x2*cos(5x1-x2);
f2:=x2-x2*sin(5x1-3x2)+x1*cos(3x1+5x2);


 


 

 
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