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hey just use cosine rule for both parts. part i use triangle abc x^2 = 1^2 + 1^2 - 2cos36 x= 0.618 hence cos36 is like this (0.618)^2 = 2-2cos34 carry the 2cos36 to the other side and take the 0.618^2 to the other side you get 2cos36 = 2-(0.618)^2 cos36= 2-(0.618)^2/2

in order of preference Sydney, uts and uws/// stuff the rest I think those are the unis that will suit me in the long run xD about uws im already gettin like 5 points + band 5 / 6 achieved through the triple points advantage soo yeh xD but its teaching ohh well..

good on ya guys.. so whos going to school on monday or tuesday to ask your teachers some question or hand in some essays and creative writing ?? also yeah we held an math hsc mock exam last week. xD insane questions but not bad.

its D because, first of all there has been people to people talk i.e people skills and since she reschedules and allocated task that represent self managment.

what the higgest mark for busines sstudies is it like 100% or 99% im talking about raw marks stuff scaled mark

hmmm Prescribed : Rabbit Proof Fence Related : The Hobbit and The Road not taken. I know, relax I just want to be part of the moment.

infinity ^ infinity

this made me laugh.. thanks for those great tips guys =]

thats some good looking marks you got there.. e1 = approx 90% thats like 75+ i think.... e2 = in the 100's finally but to play it safe say high 90's and low 100's /120

thesaurus is your friend. I hate creative writing btw.. im fine with the shitty essay xD

nice nice... the local library i go to usually attracts animals... u see people just talking in one end, and the other end people playing hide and seek xD bunch of retards but yehh.. i listen to my ipod and do hard core studying xD

you know what im just gonna have a laugh... =] stuff this.. stick to shells xD good luck mate =] stuff all this limits changing business just integrate xD lol.. cya man im back to english now xD

one more thing how can u assume that x1 and x2 0 and pi respectivly ?? you cant get a constant with that it must be an approx of the roots ?? read example in the voulme chapter.. u will know what im talking about ?? or maybe im just confused.

i didnt understand all the high light bits..? do we need to know how sin works when working out volumes.. which paper is this from btw... to be honest ive never came across with a voulme which requires more than 2-3 times integrals ?? [/B]

hmm here is the volume using teh same method as u ( i dont know what is gonig through my mind this looks insane now lol) R = out radius r = inner radius right hence let the end point of the typical slice be x1 and x2 respectivly.. there fore outer radius = 2pi - x1 and inner radius =...

yeh im at teh same spot now how da fuck do u find x2 -x 1 see what i mean those are the roots im talking about lol...... you can just assume sin^1(x1) and sin^-1(x2) see its too complicated and undoable ?

wtf// that was the height of the cylinder ?? the dam slice method is not working out here buddy.. im pretty sure its too dam hard for slice to work in this case.. because if you think about it there is no end points ?? only two roots

if you draw a typical slice p.d to x=2pi you would need to find the roots which is kind of impossible with sin(x) ?/ I know these types of question with functions only ??

i had no hope with slices.. its too dam hard to find the roots in terms of y ?? how did u do it ?

here is the working out for part ii ) lol im soo hopeless xD we know the outter radius is 2pi-x and inner is 2pi-x-dx use this as total voulme dV = pi { R^2-r^2 } = pi(R-r)(R+r) dv= pi { (2pi-x+2pi-x-dx)(2pi-x-2pi+x+dx)[ sinx ] } collect and simplify you get 4pi^2sinx -...