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Math Help - solid of revolution

  1. #1
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    solid of revolution

    Hi there i'm pretty stuck on where to start and what to do with the following question

    Find the volume of the solid of revolution obtained by rotating, a full turn about the x-axis, the area between the x-axis and the curve y = 2 sin x, for x ∈ [ π , 3π ].

    Thanks
    if anyone can help me out
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  2. #2
    MHF Contributor Mathstud28's Avatar
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    Quote Originally Posted by jimmy View Post
    Hi there i'm pretty stuck on where to start and what to do with the following question

    Find the volume of the solid of revolution obtained by rotating, a full turn about the x-axis, the area between the x-axis and the curve y = 2 sin x, for x ∈ [ π , 3π ].

    Thanks
    if anyone can help me out
    V_{x-axis}=\pi\int_a^b\left[f(x)\right]^2dx
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