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Re: HSC 2014 4U Marathon (i) let a=sinx, b=cosx sinx * sqroot(1-1+sin^2 x) +cosx * sqroot(1-1+cos^2 x) =sin^2 x + cos^2 x =1 Therefore, a^2 + b^2 = sin^2 x + cos^2 x =1.

Go to your Dad and whisper: 'Mum didn't want me to tell you this, but she secretly bought a kitten, just pretend you don't know about it." Then go to your Mum and say exactly the same thing about your Dad.

i. w^k=cis2pik/9 solutions of z^9=1: 1 is a solution, and other solutions are spaced equally around unit circle. Therefore, z=cis2pik/9 are the solutions where k = 0,1,2...8. and therefore z=w^k. (Not sure if this is a proof...) ii. R.T.P w^8 +w^7... +1=0 0=z^9 -1 =(z^3-1)(z^6+z^3+1)=(z-1)(z^2...

The thing.

Re: HSC 2014 4U Marathon - Advanced Level Noice. :D Could you explain to me how you get that first line to fit the AM-GM inequality?

Don't worry Adrita, since: That means square's band 4 English won't affect them.

Re: HSC 2014 4U Marathon :spam:

Yes.

Even if this is the case, as long as it is about discovery it should be fine. You could even discuss in the oral how the texts depict completely different portrayals of discovery which demonstrates its breadth as a concept.

Great teachers make an unbelievable difference to how much you enjoy and excel at a subject. Although I haven't done it, geography does get much better in Year 11 and 12. Economics is a very enjoyable subject too, a few of the concepts can be a bit difficult but it is mainly the amount of...

For 19 (I think this is right): sub z=x+iy into w=(z-1)^2 +2 and expand. The sub in x=0 into that to obtain a parabola.

Remember |w-z| is a distance, so it does not have to originate from the origin.

I personally thought that the copayment was a good idea.

What's it on?

Some 2015 editions are already out.

Re: Selling Cheap HSC+Prelim textbooks | Chem | Eco | Business | Can I buy your MIF textbook? Plz.

Maybe place the z at (5,-12) on the Argand diagram, then sq root its modulus and divide its arg by 2...

For B trying letting z = x+iy. Might make it clearer.

Try to make them persuade your parents into letting you drop.

Re: HSC 2014 4U Marathon I got (assuming same letters are always undistinguishable; I could be wrong lol): Number of total arrangements - number of arrangements with 2 Rs together = 12!/(2!2!2!) - (2!11!)/(2!2!2!)