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Urban/bos myth probably, though I haven't tried it.

Most common ones I use are ammonium, carbonate, sulfate&sulfite, nitrate Google/wiki "common ions" Edit: also look through syllabus, sometimes they mention specific compound - ions in those are usually useful

Seriously? No-one uses FREE PENS? Corporate pens with advertising FTW Though I use Parker for exams. But generally, free pens ftw :)

Looks like it Someone should plot all of the subjects :D

Does that make any difference? o.o

How does everyone write so damn fast? >(

Perpendicular gradients + distance formula for equal sides

Completed :)

This is using the derivative above \frac{d\frac{x}{ln(tanx)}}{dx} = \frac{1}{ln(tanx)} - \frac{1}{cosx sinx ln^2(tanx)} \\ \int \frac{d\frac{x}{ln(tanx)}}{dx} = \int \frac{1}{ln(tanx)} - \int \frac{1}{cosx sinx ln^2(tanx)} \\ \int \frac{1}{ln(tanx)} = \frac{x}{ln(tanx)} + \int \frac{1}{cosx...

When I differentiated that, I got \frac{1}{ln(tanx)} - \frac{1}{cosx sinx ln^2(tanx)} Wolfram alpha gives me the same derivative...although Online Derivative Calculator gives me 1/ln(tanx) as required.

Haha yes, English is my :sleep: time

Chrome seems to die a lot more than Firefox when I have a million tabs open, so I only use it for quickly searching up stuff. Firefox for everything else =)

Maths is inevitable if you're going to do Adv. Science - it's really a matter of stress now or stress later. Personally I think you should dedicate a set amount of time to maths (not too much perhaps) and focus on your other subjects. However you should aim to understand the concepts as...

Thanks guys, much appreciated :) If I were to prove " that if an odd function has an inverse function, then that inverse function is also odd" geometrically, how should I word it? I'm thinking something about rotational symmetry about the origin and flipping across y=x, but I don't know how...

\int \sec^3 x\tan x dx \\= \int \sec^2 x(\sec x\tan x) dx \\= \int \sec^2 x d(\sec x) \\= \frac{\sec^3 x}{3} + C

Yr 12 Cambridge, 1A, Question 20. $Consider the function$ f(x) = \frac{1}{6}(x^2-4x+24)\\...\\$(e) Let $ N $ be a negative real number. Find f^{-1}(f(N)) The answer is 4-N but I don't understand why. :confused: Also, how would you: "Prove, both geometrically and algebraically, that if an...

We get ranks for chem too, check the noticeboard When are we getting reports though?

If picking 3U English doesn't affect which teacher you will have, go for it. You can always drop later. If you truly like English, then the teacher you get should not matter that much.

LOL i thought i was the only one, so addictive X_X

I guess you should base it on the wording of the syllabus dot points, i.e. does it ask you to identify, explain, analyse, etc? As for the detail in your notes, it depends on your study preferences - are you able to go into the detail required for exams by looking at your notes? You can exclude...