Originally Posted by

**turtle** If anyone could help with the following problems, I would greatly appreciate it. I will explain what I have done beneath the problems in case I am going in the right direction.

Find the volume of the solid generated by revolving the region bounded by the lines and curves about the x-axis.

1. y = sec x , y = square root of 2 , -Π/4 ≤ x ≤ Π/4

I set R = square root of 2 and r = sec x tan x

I wasn't able to integrate sec^2 x tan^2 x (if I was on the

right track)

2. y = x^2 + 1 , y = x + 3

I set R = (x+3) - (x^2 +1) and r = 1. I don't know how to find the

intervals of integration.