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Re: HSC 2013 4U Marathon $Solve the equation$ x^{2}+(4x^{3}-3x)^{2}=1 $in real numbers.$ \ \ \ \fbox{2}

Re: HSC 2013 4U Marathon Do you guys like conics? I find it extremely boring :(

Re: HSC 2013 4U Marathon $Let$ u=\sqrt{x} \therefore dx=2udu \therefore I=2\int usin^{-1}udu $now do IBP (CBF doing it :P )$

Best way to find out is to look at the COURSE STRUCTURE of the type(s) of engineering you are interesed in. Just search "[type of engineering] engineering course structure" on google and you will have an idea of what topics to expect. Different types of engineering focus on different areas of...

A proof to this is that most scientists like Steven Hawkins have IQ's of about 157 (Relatively high but not very high).

This may sound weird but English is one of my favourite subjects :) Since I do MX2, Chem and Phys; English is the only non-scientific subject so I really enjoy it. I thought English requires a lot of memorisation (Which can get you the marks if you learn how to adapt your essays effectively) but...

$I got the result for this (using z^7-1=0):$ cos\frac{\pi }{7}.cos\frac{2\pi }{7}.cos\frac{3\pi }{7} is there a way to get the result for your question from there? I don't think so :(

This guy is amazing! I have talked to many state rankers regarding how they studied during their HSC but George's way of studying is by far the best; so efficient, effective and smart! He is also extremely helpful too! Highly recommended :)

Tablets are really bad and inefficient for education IMO (writing with a stylus is not very convenient) so a convertable or a laptop with touch screen is better because it has full size keyboard, faster processor, Microsoft Office and more and the touch screen is very useful for diagrams. I...

Get this: Just kidding :P For a laptop get: Lenovo (X1 Carbon or X230) or Macbook Pro/Air. For a laptop with touch screen: Lenovo have a lot of those but they are expensive ($1600), the X1 Carbon has a touch screen version, Samsung are releasing the new Series 7 Chronos this year which is the...

Re: HSC 2013 4U Marathon This question is from a Romanian textbook IIRC. One can find very cool questions from around the world.

Re: HSC 2013 4U Marathon Nice proof but it can be done in 3 lines :)

You will be even happier if you know this: Only 6.7% of the world's population hold a university degree :D (Australia is around 15-20% I guess) I wonder why getting into university and higher education especially is so competitive considering only few people are interested in getting educated.

Re: HSC 2013 4U Marathon Yes the result is correct and I edited the post. Hint: multiply the left side by: sin\frac{2\pi }{2^{n}-1}

Re: HSC 2013 4U Marathon $Prove that for any integer$ n>1, \frac{cos2\pi }{2^{n}-1}.\frac{cos4\pi }{2^{n}-1}...cos\frac{2^{n}\pi }{2^{n}-1}=\frac{1}{2^{n}}

That is cool man. I will probably try to join Mensa after the HSC. Now I am extremely busy with maths, science and english. What marks/course are you aiming for?

Hey, I am just a fan, an IQ enthusiast and like science and maths. Try to do this http://www.matrix67.com/iqtest/ unless you have already done it :P

I have an IQ of 275 and I have done all the questions here: http://www.matrix67.com/iqtest/ in 30 minutes. Jokes :P William Sidis died long time ago :( I have an IQ of around 150. I've been kinda obsessed with IQ tests until I got bored. I have about 22 IQ books that I downloaded from a...

Re: HSC 2013 4U Marathon Hey Sy123, many of your questions are unsolved so is it possible for you to post a solution when no one can solve the question? I guess Latex is too slow and inefficient for many people (including myself) so they just use pen and paper. Nice questions though! Keep...

What does it take to get a state ranking in English advanced (Not that I want to get one but I am just curious)? Are there any English advanced state rankers selling their essays? I would like to see their writing style, structure etc... is it like the people who want to become writers and...