1.Find the volume of the revolution solid generated by y= 3x2 - x3, from x=0 to x=3, on the x axis

2.Find  Integrals containing tangent desiccant powers and substitutions

1. s tanx secx dx 2. - sec(3 x) dx 3. J secx tanx dx f tanx dx 6. s dx (x + 1) x2 3 dx - X 3