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How do you define "optimal" in this problem? Are you trying to minimize the material used? If so, are negative values of L allowed?
Why we have so value - not shorter, not longer?
Calculation not with Mathcad but with Mathcat 

That is awesome Val
... searching of the solution

LOL
The problem, Horatio, lies not in length L, but in angle theta:
 
  
Optimal for the bird, or the cat?
Richard Jackson написал(а):
Optimal for the bird, or the cat?
Thanks!
A good question!
For us!
 
					
				
				
			
		
