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Re: The "I didn't go well in my half yearlies" Thread First, Excel hardly is a good textbook. It doesn't go into enough depth, this is a clear example of it being too summarised, and it is the reason why I don't use it. Secondly, it's logic... if you have a radial magnetic field, then the...

Re: The "I didn't go well in my half yearlies" Thread Yeah except, the syllabus states: "identify data sources, gather and process information to qualitatively describe the application of the motor effect in the galvanometer" Actually, I don't know whether my Physics teacher has taught me...

Re: I screwed up my half yearlies Yeah but if you read the rest of her answer, you'll soon find out she just got the motor effect mixed up with Faraday's Law. That is pretty minor and should only cost 1 mark. Excuse me? The moving coil galvanometer depends on the motor effect which states...

Yep that's the book I have then. No the Calculus section isn't volumes... that's in the supplyment book.

I think then that is an older version of his 4U book, dunno if it's the one that has imperial measurements in the mechanics chapter LOL... What topics does it cover? (Look in contents)

You may've gotten an older version of his book. In which case it would just contain more material from the old 4U course, because the 'revised' 4U book is just material that is relevant to the 1980 syllabus which was in the old syllabus. But if it's A5, then it would be the correct book...

The supplyment is A4, and the actual main book is A5. They're grey coloured.

I was going through the books aswell, and it's missing stuff for polynomials such as reducing equations and given a polynomial equation with certain roots, making a polynomial equation with variations of those roots. Also, I found that its missing stuff like the chord of contact, focii and...

Hi Trebla, Thanks for your info. Do you know which year it's from? Also, what do you think of the Cambridge Study in terms of its usefulness?

Re: I screwed up my half yearlies The first bit is correct too! There is a change in flux, so there is an induced EMF! That IS Faraday's Law. The motor effect is where a current carrying conductor in a magnetic field experiences a force. There is only one MINOR error in that answer and that...

Yeah, it's from last year's half yearly examination paper (my school's) but I have seen it in other trials, so I'm sure the teacher got it from somewhere. Apparantly like nobody got it correct, lol.

Thanks, Is this a CSSA question?

Hi, Could someone please do this for me? Also, does anyone know where this question is from? Thanks

Hi, Sorry but I have more questions... 1. If Im, n=∫sinmx cosnx dx, prove that Im, n=∫sinm-1x (d/dx)[(-cosn+1x)/(n+1)] dx = [-sinm-1x cosn+1x]/(n+1) + (m-1)/(n+1)[Im-2,n - Im,n] Hence show that Im, n = [-sinm-1x cosn+1x]/(n+1) + (m-1)/(n+1)*Im-2,n 2. If Un=∫0pi/2 θsinnθdθ, n>1 prove that...

Yeah I got there, and got two log expressions, but I don't know how to make them into the other form (secx+tanx) Sorry if this is really obvious, I'm pretty slow at this stuff :(

How would I use t results in this case? I tried and miserably failed :(

Hi, thanks for your help... Just wondering though, how am I supposed to know this? lol... is there a 'list' of integrals like these that I should know and be able to manipulate? Thanks

Hi again, I have another question, lol.. It's a part of the one I previously posted. Hence find ∫sec3x dx <-- I can do it until I have to find ∫secx dx, how would I do that? Thanks for your help so far ppl!

Hey Jetblack, thanks for your help! Just one question though, how do I know when to apply integration by parts or to use the other 'miscellaneous' method? Thanks

Hi, I got one more question. Could someone please help me on this one? Thanks