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Hi BOSers, I have recently decided to start tutoring mathematics, and I have a ton of resources lined up for future students from my own HSC. However, I have one major concern: copyright. Is it legally OK for me to be distributing worksheets, with questions, from, say, HSC and selective...

http://www.boardofstudies.nsw.edu.au/hsc_exams/exam-papers-2007/pdf_doc/physics-07.pdf Hi guys, I was just wondering for MC q.15 of this paper. I get how B, C and D can all be done through conservation of energy. But for A, couldn't you also use conservation of energy to say, launch a...

Hi, I was just wondering since the AM-GM inequality is so useful in inequalities: 1. Is the AM-GM inequality something we'd be able to quote in an exam, or does it need to be derived everytime? 2. If not, what's the simplest/best derivation for the case of 3 terms? (I've seen a lot of...

Try tangent-secant theorem.

Let BCD = a ECD = CED (base anges of isosceles triangle). Let this = b. Therefore, since BCE = ECD - BCD then BCE = b - a. Also, by exterior angle triangle in triangle AEC: ACE + EAC = CED EAC = a (alternate segment theorem) Therefore ACE = CED - EAC = b - a So ACE = BCE...

If you rank first internally, are you guaranteed the highest external mark for your school (with that being solely dependent on your external performance) for your internal mark? I always had the idea that that was how it worked, but someone told me differently. I stuffed my first exams...

Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread Q.16 i) (I don't know if I attached the picture correctly, first time posting here). ..Ok, apparently 2.4Mb is too big for an attachment, so: https://www.dropbox.com/s/nd9aig6szg2960q/2015-03-06%2019.21.41.jpg?dl=0...