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#1 2009-01-24 08:26:30
- Angel Rox
- Member
- Registered: 2008-11-10
- Posts: 15
Help Needed..
Q1 - Find the volume of the solids generated by revolving the regions bounded by the lines and curves about x-axis
y=√cosx where 0 ≤ x ≤ π/2 and y=0 , x=0
Q2 - Evaluate the integral
e^-√x/√x dx
Thanx in adavnce... 
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#2 2009-01-24 09:02:33
- JaneFairfax
- Member
- Registered: 2007-02-23
- Posts: 6,868
Re: Help Needed..
Q1. First, make a sketch to find the limits within which to integrate. Then use the volume-of-solid-of-revolution formula.
Q2. You can use the substitution . Alternatively, if you are smart, you will see that
is of the form
and so can be integrated immediately.Offline
#3 2009-01-25 16:16:00
- Angel Rox
- Member
- Registered: 2008-11-10
- Posts: 15
Re: Help Needed..
Thanx alot... really appreciated...
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