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Hi. My school uses Cambridge Mathematics 4 Unit by Denise Arnold and Graham Arnold along with Advanced Mathematics by Terry Lee. Is it worthwhile to buy more textbooks, such as New Senior Mathematics Four Unit Course for Year 12 by JB Fitzpatrick, Foundations of 4 Unit Mathematics by SK Patel...

Hi. I can't decide which book to buy out of the following: - Cambridge Checkpoints HSC by Neil Duncan (http://www.fivesenseseducation.com.au/products/cambridge-checkpoints-hsc-mathematics-extension-1-2012) - 100 Mini HSC's Extension 1 by John Smith...

Help Please. Show that modulus(modulusz1)-modulus(z2))<=modulus(z1+z2). State the condition for equality to hold. Thank you.

Cool. I'm interested as well.

I'm doing The Simple Gift as the prescribed text as well and I'm struggling to find a good related text.

I do go to Ngo and Sons. Thanks for the hint. I will try it out now.

I have done parts a and b, but I have trouble with part c. Would anyone be able to help me with that please?

Help Please. a. Determine the roots of z^4+1=0 in cartesian form and plot them on an Argand diagram. b. Resolve z^4+1 into real quadractic factors. c. Divide by z^2 to show cos2x=2(cosx-cos45)(cosx-cos135). (x=theta) I have done parts a and b, but I have trouble with part b. Thank you.

Thank you so much.

Sorry. I just edited the post above.

Help Please. If p is real and p is in between -2 and 2, show that the roots of the equation, x^2+px+1=0 are non-real complex numbers with modulus, 1. I have shown that the roots are non-real complex numbers, but how do I show that the modulus is 1? Thank you.

Are you allowed to take the money now even though you will not attend the university?

Hi. I was offered the USW Most Outstanding Year 11 thing by my Year Adviser. I said that I would think about it. Does anyone know what this is about? If I take the offer, does it mean that I have to attend UWS? Has anyone got it before? Thank you.

My school is still on modulus and arguments of complex numbers? Am I very behind or something?

Hi. I was on the Biki webpage with the past papers and I clicked on the past papers, such as the CSSA Trials for Chemistry, but it did not come up. Instead, a broken link came up. Did this happen to anyone? Does anyone know how to fix this? Thank you.

Hi. Does anyone know if there are any textbooks with HSC exam questions that are set out by topic. Thank you.

Thanks, guys.

I got 1 as well but the answer says i.

Does anyone know?

Help Please. If z is a complex number where neither Re(z) or Im(z) is zero and it is given that z+(1/z) is real, find modulus of z. Thank you.