My Math Forum find the area of surface generated by revolving the are about y axis
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December 11th, 2015, 06:33 AM   #1
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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?
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Last edited by skipjack; January 17th, 2016 at 07:12 AM.

 January 17th, 2016, 10:15 AM #2 Global Moderator   Joined: Dec 2006 Posts: 20,484 Thanks: 2041 The image is very difficult to read. That might account for the lack of reply.

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