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Ok hopefully polynomials will be easy-ish so I can go back and teach myself the 3u topics. We have done the 3u component of polynomials and I believe that it shall be our next topic for 4u. So I'm not totally screwed? : D

What are the main results needed from Further Trig for 4u Integration?

Hey guys, At my school, we have not covered log graphs, further trig and trig graphs. In our 4u class we have covered complex numbers, graphs and are currently doing integration. Obviously, I will have to go back upon learning these topics to graphs in order to learn how to sketch...

13 units is a lot, especially considering all of your subjects are content-based. I suggest dropping something, because as you get closer to your trials and HSC, you will need to remember heaps. On a side note, I can't imagine the pain your going through with your subjects; I am struggling...

There are worked solutions out there somewhere for Cambridge 4u. With these, the book becomes a great resource, however I agree that the 3u book is set out much more clearer and concepts are explained thoroughly yet simply.

Dont forget, your own HSC mark is counted as well, so even if you come second in the internals, you can still come 1st overall in your subject. :spin:

So those restrictions are due to the argument restrictions on w right?

I have no idea what the correct answer is. My gay ass textbook doesn't have an answer for this question : (

|w| = 10 and arg w is between and including 0 and pi/2. z= 3 + 4i + w. What is the locus of z? I know the locus of w is a circle at origin with radius 10 and only values in the first quadrant are accepted, however I'm not sure on how to find the locus of a complex number involving...

LOL ohexploitable. we all know your a super genious :P

Hey guys, Recently I've been wondering what kind of HSC results I must be aiming for to reach my goal of 95 ATAR and my dream of 98 ATAR. My subjects are: Mathematics Ext 1 Mathematics Ext 2 Physics English Advanced Economics Business Studies Also, as a side note, what kind of...

Interested in this course, but unsure of what jobs this degree would lead to. Any help appreciated : )

LOL fail. Been working on 4u for too long that i've forgotten 2u xD Thanks :)

Why does cos -nx = cos nx and isin -nx = -isin nx ?

that is what is written in the book, however now looking at the worked solutions, there may be a typo in the book. The worked solutions say z^n + z^-n = 2cos nx and z^n - z^-n = 2isin nx. If you have the Cambridge 4u book the question is ex 2.4 Q5 Confused XD

Let z = cis x. Show that z^n - z^-n = 2 cos nx and z^n - z^-n = 2i sin nx. I get up to here : cos(nx) - cos(-nx) + isin(nx) - isin(-nx) So does cos(nx) = -cos(-nx) and isin(nx) = -isin(-nx) ? This would lead to the correct answer however im not sure if this is allowable.

Yeah that's pretty much how i did it. Thanks though : )

HSC 1987 Q4 iii a) Let OABC be a square on an Argand diagram where O is the origin. The points A and C represent the complex numbers z ans iz respectively. Find the complex number represented by B. b) The square is now rotated about O through 45 degrees in an anticlockwise direction to...

Isn't gravity in the negative direction? Therefore: T = .75 + (-14.7) T = -13.95 upwards T = 13.95 downwards ?

A little confused on how to work out tension Say someone is carrying a weight of 1.5 kg upwards using a piece of string. He is accelerating upwards at .5 m/s/s. My Working SumF = m x a =0.75 N upwards After this I am led to believe that you must add that value to the bricks weight, i.e. 0.75...