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Sorry, I took your LOL as sarcasm. But my reply was also directed at the previous posters whose only response was to question the purpose and accuracy of the information. While plenty of people do a language (and get high ATARS) not many people do any one PARTICULAR language. Other subjects...

I only included subjects with 2000+ candidates. It wasn't meant to be comprehensive. Why is it that everyone's first reaction is always to search for negatives?

Re: HSC 2015 4U Marathon For anyone who wants to picture the solid: (Not equilateral, but same idea) Many people can't visualise the 'spine'. Others can't see that the curvature happens in only one dimension, like a cylinder.

Re: HSC 2015 2U Marathon Correct, but there shouldn't have been a need to split PV into 2 parts. It seems you split it then recombined without a purpose.

Source is the HSC stats published each year. I would have thought it was obvious that the purpose was to see how the subjects compare in terms of the quality of candidature.

The attachment shows for each subject the rough percentage of the candidature who score a mark which equates to an ATAR of 99 or more. Only subjects which typically attract more than 2000 candidates are shown. Edit: Left off General Maths. Its around 0.5%

Roughly 8% of the candidature get a band 6 in SOR 2.

You also need to specify whether you want the derivative in terms of x or y.

If θ is between 180 & 270, then θ/2 is between 90 θ 135, ie. 2nd quadrant, so tan θ/2 is negative.

Re: HSC 2015 2U Marathon A trapezium is bounded by a focal chord (don't assume it is the latus rectum) of the parabola x²=4ay, vertical lines through the endpoints of the chord, and the directrix of the parabola. Show that the area of the trapezium is given by LH/2, where L is the length of...

In solving (x-1)² = 2(x-1), you CAN'T divide by (x-1) because x=1 is a zero of BOTH the LHS and RHS, and hence a solution of the equation, so that solution is lost in doing the division. When solving sinx = cosx, you CAN divide by cosx because there are NO values of x for which sinx and cosx...

Your answer is right. However I've always found it frustrating trying to convince people to try 2 unit probability first. It is just 8/30 times 7/29. BTW, where did this question come from? Why would a baseball squad of 8 be picked? (unless it's T-ball)

Re: HSC 2015 2U Marathon You don't actually need series. Just look at a pair of rolls, one for Andrew and one for Jack. Leaving answers unsimplified: P(Andrew wins) = 6/36 P(Andrew loses) = 5/6 times 1/6 = 5/36 No matter how many rolls are required, you will eventually come to a pair of...

Re: HSC 2015 3U Marathon Sorry, your method is unfinished. You have proved the result only for numbers between 0 and pi/2. You now need to prove it for the remainder of the domain. And there have been a handful of HSC questions that have required specifically the calculus method.

Now that you have a solution, the asker should try to confirm that the domain and range of the Cartesian equation match the domain and range defined by the parametric equations. [ Alternative solution: write x=sin2t, rewrite y in terms of cos2t, then use sin^2 (2x) + cos^2 (2x) = 1 ]

Not sure which comment that was directed at. But check these examples of pluralism and tell me how many you have issues with: http://examples.yourdictionary.com/examples-of-pluralism.html

Square x, turn tan^2 into sec^2, rearrange to make cos^2 the subject, and you almost have y.

Does that apply to every question? If I don't know the truth about General Relativity, am I stupid for asking a question about it? Or is there something particular to this question that makes one stupid for not knowing the answer? If so, what makes this question different?

Perhaps you could be smarter in preventing them from finding out. Like ... not advertising what you've done online.

Do you realise your answer gives absolutely no indication of which way you lean? It seems you can't tell the difference between seeking the truth by asking others, and canvassing other people's opinions out of interest. Do you have any actual arguments other than labelling someone...