Is this the volume of the region rotated about the x axis?
Hi I have to find volume of solids for f(x)= (1/x) cos(1/x) from x= 2/3pi to x= 2/pi and so far this is what I have done attached here as I don't know how to type all fancy stuff- so please have a look and any guidance in completeing this will be great
First of all, your integral has been set up wrong... the volume of a region rotated about the axis is given by , so in this case
Now make the substitution , and note that when and so that the integral becomes
Go from here.