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December 11th, 2015, 07:33 AM  #1 
Member Joined: Dec 2015 From: malaysia Posts: 66 Thanks: 1  find the area of surface generated by revolving the are about y axis
The question is x = (e^t)(cos t), y = (e^t)(sin t), about y axis, where y = between 0 and 1. I have problem of finding the value of t when 1 = (e^t)(cos t) and also 0 = (e^t)(cos t), since the integral can't be integrated, so I let is as I . How to continue from my working? Last edited by skipjack; January 17th, 2016 at 08:12 AM. 
January 17th, 2016, 11:15 AM  #2 
Global Moderator Joined: Dec 2006 Posts: 20,279 Thanks: 1963 
The image is very difficult to read. That might account for the lack of reply.


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area, axis, find, generated, revolving, surface 
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