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Problem

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Textbook ExpertVerified Tutor
30 Dec 2021

Given information

Given that the period of a pendulum with length  that makes a maximum angle  with the vertical is

  
where  and  is the acceleration due to gravity.
and again the above integral can be expanded to a binomial series as 

Step-by-step explanation

Step 1.
 
Therefore,
 
The equality occurs when  
 
The coefficient of every term is less than by  
Therefore,
 

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