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Area of a curve revolved about x-axis

  1. Mar 2, 2009 #1
    I'm pretty sure i'm setting this up right i just get stuck when i need to integrate it

    the equation is y=e^x and rotated around the x axis

    I've attached the question

    can someone help me thanks

    Attached Files:

  2. jcsd
  3. Mar 2, 2009 #2

    Tom Mattson

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    You'll need 2 substitutions. The most obvious first substitution would be to let [itex]u=e^x[/itex]. Follow that up with an appropriate trig substitution and you're home free.
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