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https://vle.mathswatch.co.uk/vle/assignment/3609867/18501

 Jun 15, 2020
 #1
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 Jun 15, 2020
 #2
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a)

we first get 20/2=10 so we have 20^2pi/4-10^2pi/2=400pi/4-100pi/2=100pi-50pi=50pi

 

b)

we get 50pi/400=pi/x so we get that it is pi/80 because we divide both sides by 50 and simplify it

 Jun 15, 2020

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