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Math Help - Trigonometric Inegrals: Volume help

  1. #1
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    Trigonometric Inegrals: Volume help

    Let R be the region enclosed by the curves y=6sin2x and y=6 over the segment [ π/2,3π/2]. Find the volume of the solid that is obtained by rotating R about the line y=−1.1.

    i get V=451.7359646 but its wrong..



    == >


    then i found the antiderivative of sin4x and sin2x and got the final answer of the Volume. what did i mess up on?
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  2. #2
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    Quote Originally Posted by Baatata View Post
    Let R be the region enclosed by the curves y=6sin2x and y=6 over the segment [ π/2,3π/2]. Find the volume of the solid that is obtained by rotating R about the line y=−1.1.

    i get V=451.7359646 but its wrong..



    == >


    then i found the antiderivative of sin4x and sin2x and got the final answer of the Volume. what did i mess up on?
    Is your function 6Sin^2x or 6Sin2x ?

    Your calculations suggest it is 6Sin^2x

    I get 426.6
    Can you show your calculations for your integrals of the powers of Sinx ?
    Last edited by Archie Meade; February 14th 2010 at 02:13 AM.
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