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Correction* Your integral should look like this after the substitution: \int_{0}^{\frac{\pi}{4}} \ln{(1+tan^{2}\theta)} d\theta

I was able to manipulate it to: \int -x\cot{x} dx Which I believe cant be integrated, via elementary methods.

Now I feel like I know you irl and you just made this account just to troll with drsoccerball

This is obviously someone's alt account.

So whens the wedding? Am I going to be invited?

From the sounds of it, we might actually have someone who will break the 70 barrier.

6 days left everyone!

re: HSC Chemistry Marathon Archive Pressure does impact temperature. How else do refrigerators and air conditioners work?

I believe this has been asked before: \int e^{x} \sin{x} dx

re: HSC Chemistry Marathon Archive I have a question for the people doing industrial chemistry. I know that the K constant changes according to temperature, but how about pressure? My teacher said that a change in pressure will cause a change in temperature, hence cause a change in the K...

re: HSC Chemistry Marathon Archive Personally I reckon mentioning the Winkler titration method will impress them enough considering that its not in the syllabus. I think that talking about the actual process itself will be a waste of space and time.

ftfy

re: HSC Chemistry Marathon Archive Algal booms are excessive algae growth, whereas eutrophication is the result of excessive nutrients in water.

re: HSC Chemistry Marathon Archive What do you mean by 'combinations'? I hope you don't mean the combinations, as in the mathematical topic for 3U known as 'Permutation and Combinations'.

I've always been taught to use a hotplate with a water bath for esterification

Possibly Sy123, if he wasn't already busy

Link it, because every maths site says its between the two intercepts. The best way to remember it is: Transverse axis: 2a Conjugate axis: 2b

For 8, A is correct because when e->0, the ellipse can either go taller OR go narrower. It doesn't do both at the same time. The reasoning behind this is because as e->0, b->a or a->b (doesn't really matter which), hence the ellipse can change shape in only one way. But for 9 I got C, because...

We are still awaiting your book carrotsticks.

re: HSC Chemistry Marathon Archive Barium Sulfate.