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Oh and for Qn 2 - bos1234 I think you misread the question (it took me a second take, too). Now, it's true that, as long as you don't want to get stuck in the complex number system, you can only 4th root positive numbers. But if you do 4th root a positive number, you produce both positive and...

I'm not quite sure which two reflections you're referring to. For y = sqrt{-3(4-x)} to be defined, we need -3(4-x)>0, which leads to the domain being x>4 only. The range is y>0 since we're only graphing the positive square root. If we rewrite this as y = sqrt(3)*sqrt{-(4-x)}, i.e. y =...

I'm unusually productive this Easter Holiday. I covered 2U/MX1 motion from the Margaret Grove book through 4 or 5 episodes of The X-files a few days ago. I'm planning to do the chapter from Cambridge by the end of the holiday. And I spent a fairly solid afternoon yesterday starting and, to my...

I'd say maths (all 4 units)/chemistry/biology are my equal favourite, and equal best, subjects. EE1 would also have to be a "best" as far as results are concerned but unfortunately many other activities come before it on my list of favourite things.

Fantastic results, everybody. Great work!

11 units. I'm strongly inclined to consider the option to let go of Ext-1 English. The Postmodernism elective dampens my spirit and the idea that everything is a constructed semiotic illusion isn't particularly motivational. Although the current 1st/27 rank is still somewhat alluring. As of the...

Adv English: AOS, Module C, maybe a quarter into Module A. Ext-1 English: Half-way through Postmodernism: Orlando, almost finished Possession. Ext-1 Maths: Everything but: Application of Calculus in the Physical World (Motion), Polynomials (Newton's method), Series & Applications (Geometric...

Haha. Well done! :)

I think I missed that cue to make a response, but I think I've said enough on the matter. Let's move on and address the subject of this thread. I got 2U maths back yesterday and Ext-2 maths today. 2U (too bad this doesn't count for anything) Mark: 48/48 Rank: 1/74 Ext-2 Maths...

Everybody gets that. I had my MX2 exam on Monday and there were about 15 marks' worth of questions I couldn't do. Soon after I got home all the solutions just started popping out in my head. I don't like mental gridlocks. Don't worry too much. If it was a hard exam, then a lot of other people...

We always have a 10 minute tea break during the after school Ext-1 English class. To our delight, the teacher announced (and this is not the quote): "Oh girls, I have some chocolate cake for you!" Everybody took a piece, but just as we were ready to start munching, she said - to my utmost...

Let z=x+iy & ź=x-iy then equate Re & Im parts from given expression to form 2 simultaneous equations?

Have you tried taking out the 2 from the denominator on the LHS, then multiply both sides by (x+3)^2?

Oh right. Forgot about the sketch bit. The value for theta that you got doesn't seem to be correct. I'm somehow getting theta = 0.92729 radians which is closer to 53 degs. I think the question would prefer you to sketch y = 5 cos(x - theta) because to sketch y = 3cos(x) - 4sin(x) by the...

Theta is supposed to be the related (auxiliary) angle, which means it should be positive acute. For your question theta seems to be negative acute, from what I have. This makes me a bit worried about these two: a cos(x) + b sin(x) = R cos(x + theta) a cos(x) - b sin(x) = R cos(x - theta) I...

a sin(x) + b cos(x) = R sin(x + theta) a sin(x) - b cos(x) = R sin(x - theta) a cos(x) + b sin(x) = R cos(x + theta) a cos(x) - b sin(x) = R cos(x - theta) For you question, you needn't worry about which one of these to use because the form in which you should express y= 3cos(x) - 4sin(x)...

We have about 23 people doing MX2 at my school. We all had to sit the first 2U assessment, in case someone would want to pull out - one girl did go back to MX1 so it was a good thing she sat the 2U assessment. This term only the bottom borderline MX2 students (about 4, I think) did the 2U as...

Too bad. You don't do 4 units of Eng any more. All speculation is futile. Regarding how to get 0/100 for physics, let me propose you should try your very best to get the last internal rank and spend your 2 hours of HSC physics exam time composing an eloquent hate letter to the board. That...

Rewrite everything in powers of cosx? De Moivre comes to mind for some strange reason. Which topic was this under? If that doesn't work, then for the most obvious solution: Clearly, 3x=4x Hence 4x-3x=0 => x=0 Edit. And don't go bossing me around. Damn you, man.

I asked my deputy principal about the same issue at the beginning of Yr 12. She had no idea so she asked the local BOS liaison officer when she came to our Yr 12 info evening and the official guidelines regarding this is exactly as pLuvia said. So be assured that if EE1 & EE2 are your two best...