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i agree, if its easy.. 90+ should be on the cards.. well atleast 85

hmm, it depends which course you aspire to do in university. I suggest you check out the UAC guide for any listed pre-requistes or assumed knowledge for the courses you wanan do at uni. As for doing maths... if you like it then do it, if you have a mathematical mind do it (will scale well...

Why does it matter if your teacher lost the exam? you need to know the whole of preliminary regardless. hmm you get told the questions before the exam? o_o

lnsqrt(2-x/2+x) =lnsqrt(2-x) - lnsqrt(2+x) = (1/2)ln(2-x) - (1/2)ln(2+x) = (1/2)[ln(2-x) - ln(2+x)] y' = (1/2)[ (-1/2-x) - (1/2+x)] then simplify and u get ur answer which is -2/(2-x)(2+x) yep, the secret to differentiating logarithms is first simplifying it:wave:

you should read tim riley's year 11 economics textbook to re-cap. goodluck!

Ok heres the question. ABC is an acute-angled triangle. i)Show that: tan(A+B)=-tanC ii)Hence, show that: tanA+tanB+tanC=tanA.tanB.tanC EDIT: Nvm, i got it lol For (i) A+B+C = 180 (angle sum of a triangle) therefore A+B=180-C tan(A+B)=tan(180-C) tan(A+B)=-tanC (ii) tan(A+B)=-tanC...

you're on the right track... now just sub in those values back into 3x-y+1=0 to get your co-ordinates.

can u post working out for 5b? haven't done that type of question at school yet and just the answers for 4b,c <== havent done that at school either but i know how to do them lol

bump..:apig:

So who has done their math/math ext prelimary final paper? Any unusual or hard questions that you came across? If so, can you please post the question here if you got the answer or not, i wanna practice before exam next week. Any math questions that anyone need help in can be posted to, i'll...

Re: maths again k thanks tommyskins lol, dont you have better stuff to do like study for ur hsc, rather than answering math questions for people on bos :apig:

Re: maths again instead of squaring both sides cant you do take the sqrt2 up so | x- y| = 2 so the locus is x-y = 2 or x-y=-2 not (x-y)^2 = 4 .. correct me if i'm wrong.

ahah chemmeh... physics practical exam, exam duration 1h, weighting 30% physics final preliminary exam duration 2h, weighting 30% chemistry practical exam, duration 1h, weighting 25% chemsitry final preliminary exam, duration 2h, weighting 25% dont know why the practical assessments are so...

Re: maths trigonometry fundamental formulas (not sure if they're called this) SIN when sinx=sina x = a + k360 or x = (180-a) +k360 where k is any integer COS when cosx=cosa x = +-a +k360 where k is any integer TAN when tanx=tana x = a + k180 where k is any integer x is the angle/s that...

I would relax, but then i'll get the shit beat out of me.:apig:

by the way, does anyone happen to ahve any past chemistry or physics practical papers? i've searched and only found one but it was on the electricity topic for physics. My practical assessment for physics will be focused on the topic of "moving about" any ideas of what practical it could be...

@thread starter .. go back to general maths please cant even do taht question then couldnt even see that namu's answer was also correct

hmm ok, thanks for all your replies people, appreciate it. Gotta get used to these exams as there will be quite a few next year x_x

I dont think its a good idea going with 10units at this stage when you're only getting 73%, 50% for ex1 maths. But thats my opinion.

Hi all, next week i have my final preliminary exams and to go with chemistry and physics exams (2h each), i also have to sit for an addition 1hr "practical-based" paper for each. These practical exams are worth 25% each for prelim =| Anyway.. has anyone had a prac exam for chem or phys this...