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Ill add on: 1. Total is 7!/2! cos of the repeating S. Then the number of ways where the S's are at the end : 5! x 2!/2!. So the probablity, if I didn't do any mistakes should be (5! x 2!/2!)/(7!/2!) 4. Think the question is trying to make itself seem tricky by adding the 720 ways and if they...

Another way, convert tan theta into sin/cos. Then just multiply and eventually you'll get the equation sin^2(\theta)-3cos^2(\theta)+2sin(\theta)cos(\theta)=0. Factorising it will give you (sin(\theta)-cos(\theta))(sin(\theta)+3cos(\theta)). Solve for both equations and you get your answer

Textbook --> past papers

I only self-learned integration cos it looked cool, but yeh I had to go through all of it in ext 1 then onto 4u, but once you get the idea which is the hard part, applying it isn't hard. Haven't done anything else in 4u so can't speak for rest

Yeah easily. Terry Lee one of the best for 4u, though Eddie Woo>>Everything ngl

Textbook --> Past papers

you don't

number of quotes usually = number of marks -1. so say a 3 mark question, you can use 2 quotes. Just make sure to explain really well

past papers beats all

So pretty much, just divide x^4-2x^3+x^2+ax+b by x^2+x-1. You would end up with the reminder being, (a-3-5)x +(b+5). You want the reminder to be 0. So you solve for a-3-5=0 and b+5=0 Its a good question ngl, just do what ever comes to your mind and hopefully it'll lead you somewhere

Recommend doing the trial papers always, since they are usually harder than the acutal HSC, from which I heard, and if you have trouble with the questions, you can always refine your knownledge on the topic through the textbook

Hey, so i plan on dropping bio next year so does it matter if i fail the prelims for it? I don't want to waste time studying for a subject that im not going to do, rather spend it studying on other subjects, so does it matter if i fail the subject?

The bible of 4u

Yeh lmao everyone saying it looks like a router. Im just hyped for spiderman tho, looks dope

Manga is like 2000x better

First one, let roots = alpha, 1/alpha and beta. So if we multiply them, we get \beta = -4 Then if we add them the roots we should get -b/a. However as there is no x^2 term, -b/a=0. So if you add them you would get 0. You should be able to solve it from there. Same thing with 2. If you let...

If you integrate an acceleration-time graph, you get the velocity. Something to note : Differentiating displacement/distance-time graph gives velocity. Integrating gives nothing differentiating velocity-time graph gives displacement/distance. Integrating gives acceleration Differentiating...

Check out conqueror HSC, they got a discord

Nah perms and combs is quite easy self-learn as long as you have the answers to the questions. Hell, anything is self-learnable if you put in the time and effort. You can find a bunch of questions online and in pdfs.

So im self-learning integration and im up to reverse chain rule. I done u sub before, and when I check my answers on wolframalpha, it often does it by u-subbing. So are they similar? And are there any qestions where reverse chain rule is better than u subbing?