# Search results

1. ### HSC Extension 2 Mathematics Predictions / Thoughts

Wait I think I'm gonna get around 85 as my raw mark for the HSC, but I got like around 65 for internals, with my rank being 12th in the cohort. Will this be enough to pull a E4???
2. ### HSC Extension 2 Mathematics Predictions / Thoughts

yes please could someone share the paper if they have it???
3. ### De Moivre's Theorem

This is the full solution
4. ### De Moivre's Theorem

The extra 2 comes for 2\cos\frac{k\alpha}{2}
5. ### De Moivre's Theorem

Yep I see it now sorry that was a bit incorrect, i just fixed it up
6. ### De Moivre's Theorem

i cant even see what i typed, its just coming as a small square
7. ### De Moivre's Theorem

LHS=(1+\cos\alpha+i\sin\alpha)^k+(1+\cos\alpha-i\sin\alpha)^k \\ =\left(2\cos^2\frac{\alpha}{2}+2i\sin\frac{\alpha}{2}\cos\frac{\alpha}{2})^k+(2\cos^2\frac{\alpha}{2}-2i\sin\frac{\alpha}{2}\cos\frac{\alpha}{2}\right)^k \\...
8. ### De Moivre's Theorem

Use Double angle formulas to get rid of the 1 in the LHS and then start from there
9. ### Hard Proofs Question

What 4U exam???
10. ### Hard Proofs Question

Surely that question is not in the syllabus
11. ### Excel Biology Book

Hi, I was wondering if anyone has the excel biology book either as a pdf or a hard copy. If so, can someone send me just the questions for module 5 and 6. I dont really need the theory, but just looking for the questions. This would be greatly appreciated. Thanks! :)
12. ### A Broad Essay question for common module.

oooo thank you so much!!!
13. ### A Broad Essay question for common module.

Hi, I was wondering if anyone has a broad essay question for the common module, that I can write my master essay on. My prescribed text is Billy Elliot. Thanks!
14. ### complex number question

You can also do it algebraically by considering z=\cos(2\theta)+i\sin(2\theta)
15. ### Carrotsticks' 2017 Mathematics Extension 2 solutions

yh I ended up using them instead
16. ### Carrotsticks' 2017 Mathematics Extension 2 solutions

Does anyone have access to his solutions? Apparently the solutions in the dropbox were deleted. If anyone has carrotsticks solutions, please let me know. Thanks
17. ### Essay Feedback

Hi, I was wondering if anyone is able to give me feedback on my essay. Its on Henry Lawson's short stories Any help would be greatly appreciated :)
18. ### Physics Question

I was confirming if that's the correct way to do it?
19. ### Physics Question

Hi, could someone help me with this question? My approach was to do: -\frac{GMm}{2r_f}-(-\frac{GMm}{r_i}) since initially, it had no kinetic energy (it was at rest) and later was placed into an orbit.
20. ### Physics question

Alright then it's settled that the question is probably flawed!