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answer
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21c
Problem

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Textbook Expert
Textbook ExpertVerified Tutor
30 Nov 2021

Given information

The given equation (As per 21a) is       

Step-by-step explanation

Step 1.
According to the question 21a, 
 
We have      
 
Now, derivate the above equation with respect to , we get
 
 
   
Thus,
 
 
 
 
Then, arc length  

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