February 20th, 2012, 05:03 PM  #1 
Newbie Joined: Aug 2011 Posts: 25 Thanks: 0  notation and volume integration
sorry if this is in the wrong section but i am doing a math problem which says f(x)=cosx and g(x)=secx for x ? ] pi/2, pi/2 [ what are these reverse brackets? edit : i am having problem with this problem. Let R be the region enclosed by the two graphs. the Region r is rotated through 2pi about the x axis to generate a solid. a) write down an integral which represents the volume of this solid. b) hence find the exact value of the volume. i have tried to find the integral using the cylinder method, but i am having trouble. i have done integral of sec(x)*cos(x)*2*(2pix) although this is a dy problem and now i am stuck 
February 21st, 2012, 02:33 AM  #2  
Math Team Joined: Nov 2010 From: Greece, Thessaloniki Posts: 1,989 Thanks: 133 Math Focus: pre pre pre pre pre pre pre pre pre pre pre pre calculus  Re: notation and volume integration [color=#000000] Quote:
but this integral does not converge![/color]  

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