lol just went back through solution and its wrong haha shit. I got to the point where I had to prove that l/cos(theta) = -1. but I dunno how seeing as l/cos(theta) is positive. the question may be wrong.
Yeh its ridiculous, they are from 300 schools and they expect to get 90%+ when they are only an average student for gods sake, haha yeh i think his one said that as well. And sounds good
for ion testing, when differentiating between Fe2+ and Fe3+, do u reckon its alright if I just learn the thiocyanate equation or should i learn the permanganate one as well?
yeh i finished the paper with 30 mins to spare but cbfd checking over. The last binomial was nice, but on the whole not too bad a test. The one thing i wasnt sure of was when u got to a=-18(2x-1) and u had to prove SHM lol, i just said it is in SHM because its in the form a=-n^2(x+c) lol.