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coyney

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Hey can someone please help me with part b, cheers.
a264d0024d3b987d6f5d2a254d1fb5a4.png
 

braintic

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y=1/sqrt(1-x^2)

sqrt(1-x^2) = 1/y

1-x^2 = 1/y^2

x^2 = 1 - 1/y^2

V = pi times integral (1 - 1/y^2) dy

which you should be able to finish after changing the limits to y-values.
 

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