The formula provided represents the volume of the solid obtained by rotating the region enclosed by the curves `y = sqrt(sin x), y = 0,` about y axis, using washer method:
`V = pi*int_a^b (f^2(x) - g^2(x))dx, f(x)>g(x)`
You need to find the endpoints by solving the equation:
`sqrt(sin x) = 0 => sin x = 0 => x=0, x = pi`
`V = pi*int_0^(pi) (sqrt(sin x) - 0)^2)dx`
`V = pi*int_0^(pi) sin x dx`
`V = pi*(-cos x)|_0^(pi)`
`V = pi*(-cos pi + cos 0)`
`V = pi*(-(-1) + 1)`
`V = 2pi`
Hence, evaluating the volume of the solid obtained by rotating the region enclosed by the curves `y = sqrt(sin x), y = 0` , about y axis, using washer method, yields `V = 2pi.`
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