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Pedro123's latest activity
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Pedro123
replied to the thread
HSC Advanced Mathematics Predictions / Thoughts
.
I'm not sure how right the answers are, seeing as it says 2 for 10 (MCQ) when it's 3, so dw. I haven't checked the other ones though
Oct 27, 2020
P
Pedro123
replied to the thread
What is this technique??
.
Personification?
Oct 18, 2020
P
Pedro123
posted the thread
1984 and Fahrenheit 451 as Related Texts
in
English Advanced
.
Does anyone have any suggestions for resources available to use Fahrenheit 451 as a related text for 1984? Also, for people who did...
Oct 14, 2020
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Pedro123
reacted to
Trebla's post
in the thread
De Moivre's Theorem
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Like
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Just expand the RHS using compound angles and it works out. You actually don't even need to memorise this because it's in the reference...
Oct 13, 2020
P
Pedro123
replied to the thread
De Moivre's Theorem
.
Thanks guys - turns out I just pulled a bit of a dumb :) Out of curiosity, does anyone have any ideas to prove the sum of cosine...
Oct 13, 2020
P
Pedro123
reacted to
B1andB2's post
in the thread
De Moivre's Theorem
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Like
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This is what I’ve been doing I don’t know how to finish off the last line, but most of it is there Sorry it’s so messy also just...
Oct 13, 2020
P
Pedro123
reacted to
Trebla's post
in the thread
De Moivre's Theorem
with
Like
.
As a hint 1+\cos\theta-i\sin\theta = 2\cos^2\frac{\theta}{2}-2i\sin\frac{\theta}{2}\cos\frac{\theta}{2} =...
Oct 13, 2020
P
Pedro123
posted the thread
De Moivre's Theorem
in
Mathematics Extension 2
.
Not sure how to solve the following: (1+cos(a)+isin(a))^k+(1+cos(a)-isin(a))^k = (2^k*2)*cos(ka/2)cos^k(a/2) I can get it down to...
Oct 13, 2020
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