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Haha, thanks for that. I intuitively tried this way.

Yea, but we are not dealing with mod z1 or mod z2 but mod(z1+z2) and mod(z1-z2) And what do you mean by positive and negative cases?

\\$Let $z_1=kiz_2$ (Arguments differ by 90^\circ ) \\\left | z_1+z_2 \right | \\=\left | z_2(1+ki) \right | \\=\left | z_2 \right |\left | 1+ki \right | \\=\left | z_2 \right |\sqrt{1+k^2} \\=\left | z_2 \right |\left | ki-1 \right | \\=\left | kiz_2-z_2 \right | \\=\left | z_1-z_2 \right |

I agree with most of what you've said, but 90 is still too low, IMO. 90/100 of raw mark means that the person can't answer 1/10 of exam questions correctly. Whether it's due to stupid mistakes or lack of knowledge doesn't matter. And plus, consistent mark of 90/100 would mean that stupid...

+1

You might be interested in researching about commercialisation of Vanadium Redox battery (since this battery is in the syllabus).

Well, yeah. You don't need it, but it's sometimes useful in solving some questions. It's not a difficult concept so you might as well learn it.

Can I just ask you, why do you need this info for the Production of Materials? It's out of the syllabus.

Re: Which book is more helpful?? is prob one of the best.

No, not at all

1.61% of candidates for the 2008 HSC I assume that you just gotta do close to non-attempt.

It's just for in case 4u people drop to 3u or 2u. In the very end, you will be ranked amongst 2u and 3u people.

Yes, that's true. This relativity principle works in both ways as motion is relative.

lol, I remember me rejecting this scholarship offer because I didn't know about the $500 cheque rofl

Hard to show it on comp... Ask someone who has a maths drawing software

arg [ z+2 / z-2 ] =arg [ z+2 ] - arg [ z-2 ] =-(arg [ z-2 ] - arg [ z+2 ]) =-arg [ z-2 / z+2 ]

Overall, very good notes, although some are over the top and some are missing. And as with all notes, there would be mistakes, but only some Although I didn't emphasise the positives, they are good notes, IMO. Wanna rep for posting but lol, must spread it... I don't find many ppl to rep...

or undefined (argument)

Yea, that's exactly what I did. Except that there are two restrictions you need to add onto it.

LOL, it's surprising that someone even cares about this.