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Question: evalv max/min of function

Question:evalv max/min of function

romanrieme 35 Maple 2021
optimization ode dsolve numeric differential-equations
October 13 2022
1

Hi everyone

I am trying to get the maximum value (angle) for a function, which is a solution from a ODE. I tried evalf(max.. which I already thaught wouldnt work. 

After that I installed the package "DirectSearch", again with no success. 

Does anybody know what I am doing wrong or how I am going to get the maximum. I added the maple file with the direct seach attempt. 

Thank you in advance!
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