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..... and here are the solutions and student results for the 2022 Mathematics Extension 2 BoS trials! 🎆 Thank you to everyone who participated and for your patience! Thanks especially to the other members of the marking team Paradoxica, dan964 and 1039213 for their hard work in helping to get...

Coming soon… just finalising a few pieces

Nekkminit it’s only hard because of “brute force” questions (e.g. prove formula for sin 16x by De-Moivre’s theorem)

You might find this useful: https://boredofstudies.org/threads/a-guide-to-maximising-your-graduate-employability-whilst-at-university.319711/

Basically what 011235 wrote with one little twist. The expected method involves squaring both sides, which introduces an incorrect solution. You’ll need to pick the correct one with justification. A lot of questions are based on well known results in the broader mathematics/chemistry field...

In general, when doing a trigonometric substitution to solve a polynomial, there are usually two approaches: x = tan θ (which permits x to be any real number as parameter θ varies) x = kcos θ or x = ksin θ (which constrains the roots to be between -k and k, so the choice of k is important)...

Thanks for picking that up. Edited that in the paper now. As for the marking, any students who chose (B) will be treated the same as the students who chose (D) for that question.

Now that the BoS trial events are done, I want to extend my sincere thanks to the rest of the team who helped put the questions and paper together for Maths and Chemistry (in particular to Paradoxica, sharky564, jazz519, Dazzling_Light, IAmWinston and edwxnsamuel). :tennisclap: Also massive...

Thanks to all those who attended the Chemistry exam today! Hope you got a valuable experience from this exam! :spin: For those who have asked, I will aim to upload the question papers (and make some acknowledgements) by tomorrow.

Thanks to everyone who attempted the Maths papers today (sorry for the delays in timing)! Hope you enjoyed doing the challenging questions. It was also great to meet some of you in person as well! :) Solutions and marking will proceed as usual so your patience is appreciated. If you have any...

Hi guys, FYI we’re running a bit behind schedule so please arrive at around 2.50pm for a 3.00pm start.

Get excited! Maths is on tomorrow! :awesome: Just a reminder of the time and place below. Please arrive at least 10 minutes beforehand. Mathematics Extension 2 9:50am - 1:00pm Mathematics Extension 1 2:30pm - 4:40pm Sydney Centre of Mathematics Level 3/2 Wentworth St Parramatta NSW 2150...

No, it varies year to year. It is a ranking system after all. See table A9 in the preliminary scaling report, if you're still not convinced.

Suggest checking out this flow chart https://www.boredofstudies.org/threads/flowchart-of-how-hsc-marks-and-atar-are-determined.390261/

A corollary you need first is that for any complex number z (something you can easily prove): \text{Re}(z) \leq |z| Notice that since the terms of the sum are conjugates of each other: z\bar{w} + \bar{z}w = 2\text{Re}(z\bar{w}) \leq 2|z\bar{w}| = 2|zw|

Only 4 more days to go! :skip: Thanks to everyone who has registered so far! I would like to provide an important update on the registration availability. For Mathematics Extension 1, we are almost at full capacity. I will continue to take registrations for this subject up until 11:59pm...

Easiest way is to just substitute each given root into the LHS and show it equals zero.

It’s hard to make any generalisation on “reliability” when the level of uncertainty is quite high for something the users want good precision for. At the end of the day they’re just using mathematical models based on very limited data points available to the public. In that regard, none of the...

Bump! Still got spots left.

Yes. This can happen. In fact it has happened to the founder of this website iirc…