Math Qs (1 Viewer)

[plodge]

the curve y=sex x is rotated about the xasis btwwen 0 and pi over 4 calculate the volume of solid ofrevolutons

 

[ellen.louise]

y=sex x does it?

ok... just imagine } is that wierd integral sign thingo...

V=
hang on, i'm working it on paper...
yay for revision....

 

[ellen.louise]

V= pi* pi on 4 { xsquared.dx
= pi* pi on 4 { sec squared x.dx
= pi* [tanx] pi on 4, 0
= pi (tan45-tan0)
= pi* (1-0)
=pi

:wave: