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Weird, I got the same answer but when I sub in my t value it doesn't give me the values it should, for example when I sub in t=29.854 the derivative should be 0 but I get something wack on my calculator.

Can anybody help me differentiate I understand it's the chain rule but I keep on making errors and subbing in my t value doesn't give the rate of change I want, so I just want to double check I have the right solution.

For your ATAR how much/how hard did you have to study , Was it difficult balancing extracurriculars with the workload and did it lead to any burnout or was it relatively easy-going ?

Thanks for the input, sometimes I feel like I'm doing the bare min when i read that some people on here do like 6 hours a day.

I know this a largely subjective question but just wanted to gather an idea of what others are doing. I'm not looking for a crazy ATAR but just enough to get into the top 5 at my school for a scholarship, 85 would probably get me pretty high up there and also get me into my course of choice...

Can anybody help me with this trig equation q it's got me pretty stuck

Cheers, that helps. Although I'm a bit confused on the working from lines 4 to 5.

Having trouble with 8 b and c in this q

Thanks mate, got it done.

Can anybody help me with this question, would be appreciated.

Can anybody please help me with questions 4a and 4b, It would be appreciated. Not asking for a full solution but just want some guidance as I'm stumped. You can't see it in the photo but the values for bin 0 and 14 are $1

Have to do a multimodal presentation for 1984 and was wondering if anybody could recommend a related text for 1984.

Could anybody help me with question 8a ? The book gives no explanation on how to simplify these so I don’t really know where to start.

Can anybody help me with this q, probably pretty easy but I’m not very good at trig and catching up on what I’ve missed.

Can anybody help me with this Q: A cube is expanding so that it's side length is increasing at the constant rate of 0.12mm/s. Find the value of increase in it's volume when it's side is 150mm.

wanna swap ;)

Been finding Physics kind of hard at the moment, especially dynamics. The math I'm fine with but I just don't understand the concepts and how to choose the right formula for a question. Once I have the formula I'm good because it's just maths at that point. Anybody else feel this way at the...

Cheers, this helped heaps ! Cambridge q's are really a different beast to Math In Focus...

Only at a at the moment, I know x coordinate would be 0 but not sure how I'd find the y coordinate. I'm guessing the equation for the circle that B and A lie on is x^2+y^2=\lambda^2 so maybe y=\sqrt{\lambda^2-x^2} is the half that B lies on, I don't know where to go from there 🤷‍♂️

I'm also keen if anybody is willing to share.