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### Frustrations with being slow.

posted Apr 28, 2009, 6:09 PM by Eddie Woo
 I'm a pretty slow person. That's an unqualified statement. There are very few things in all of life that I do quickly. That includes washing dishes, running, thinking, marking exam papers, setting exam papers, learning new things, and so on. I'm a particularly slow writer - I was never able to write more than four pages in an hour when doing essays under exam conditions. (During the HSC, I was one of the people who watched on in dismay as others around me repeatedly put up their hands and asked for new writing booklets while I was still on my first one.)I'm slow with updating this website, too. As I was trawling through the folders on my computer where I store all my classwork and files, I noticed heaps of documents and worksheets I'd written that I hadn't uploaded. Here's a list of what I've put up just now:Summary of Line Forms (year 8). This is a guide to slope-intercept, 2-point, general and all the other different forms that you can use to express the equations of straight lines.Proof of the sin(A+B) and tan(A+B) trigonometric expansions (year 11, 3U). This is a very neat geometric demonstration of the reason why sin(A+B) = sinAcosB + cosAsinB and tan(A+B) = (tanA + tanB)/(1 - tanAtanB).Differentiating Exponentials (year 11, 2U). Polynomials are easy enough to differentiate (e.g. f(x) = x^a, where a is a constant), but what happens when the variable is in the power (e.g. f(x) = a^x)? This guide uses first principles to work out the derivative of an exponential function.Worked solutions for the 2008 preliminary 2U maths final exam (year 11, 2U). Only selected questions are included, but the ones that are there are handy anyway.Marking guidelines for Q1 of the 2009 HSC 2U maths term 1 exam (year 12, 2U). This is the question I marked, and so I prepared a detailed outline of where marks were allocated. Unfortunately I was sick on the day these were presented so I never got to show it.Worked solutions to past HSC questions on exponential growth & decay (year 12, 2U). These questions are drawn straight out of actual Board of Studies HSC exams, so this is the actual standard you ought to expect to meet in the external assessments. Specimen solutions are provided.Whew! In addition to uploading all those, I updated the 10E homework page with the most recent exercises and sheets that have been assigned since last bookmark.Lastly - and this is the update that has been the longest time coming - you will notice that there is now a proper Year 12 section, and the Preliminary IPT section has been reinstated. Last year when the IPT class entered the HSC part of the course, I simply renamed the preliminary section. However, the sections were getting a little big, so I decided to split them off properly. I also re-arranged the navigation because I felt the left-hand menu was getting too long for my liking.Okay, I think that's all of today's updates! See you all at tomorrow's athletics carnival.