intergrate:

1) cos2xsin3x dx

2)1+x((x+Inx))^0.5

x

3) got this question sitting in front of me and not sure how to get my head about it sounds simple but aint got a scooby doo:

'Find the volume generated by rotating the area bounded by y=x^2 and y=4 around the line y=-1

ty x