MarieCurie22 wrote: » I am so screwed....We had one class a week for two years and I did the bare minimum. It was an 8th subject so I didnt take it seriously...now Ii wish I had last minute tips ideally Id love any sort of B but i want at least a C1??
Undeadfred wrote: » Anyone feeling overly cocky?
Undeadfred wrote: » For those 'prove that mew is greater than or equal to x' questions in statics, is it ok to show that mew = x and then just go, 'therefore, mew is greater than or equal to x'
lostatsea wrote: » Yes. Prove the equality first - this is the point at which it is about to slip. For all values of mew greater than this it is stable.
Undeadfred wrote: » Do you have to say any of that though? can you do it without writing anything?
xJEx wrote: » Does anyone know what definitions we need to know? I know one only pops up VERY rarely, but i'd hate to lose marks for something like that or for it to cause me to avoid a question I like
Prodigious wrote: » Could someone please explain what is happening for 5(b) 2008 on the mariking scheme, where he's doing Tan(alpha+45)? Normally for the angle it's deflected through I would just use the tan(theta) formula in the logs, but when i did that I got the same answer with the wrong signs.. Thanks
Monsieur Folie wrote: » When you look at the stats for this in August and see that one eejit failed, it'll be me. I love this subject, I wish my school offered it! I foolheartedly took it on after the mocks and dove in getting a good 2-3 questions done but then as the teachers piled on the work my other subjects took priority and now I'm back to square one. Literally just looking to try and scrape myself over the 40% mark now.
xJEx wrote: » Why bother if youre not gonna count it?
Monsieur Folie wrote: » I didn't know I wasn't going to count it when I started! Also, I really enjoy it, I just haven't done much with it the last few weeks because I had said when I took it up that if time got tight I'd prioritise my other subjects, and that's what happened.. I'll do my damndest to pass it though!
Undeadfred wrote: » You prob will on attempt marks
xJEx wrote: » http://thephysicsteacher.ie/Exam%20Material/AppliedMaths/pdf/Higher%20Level/Marking%20Schemes/2000.pdf for the end of question 5 why is it tan (theta) = tan (beta - alpha)? I have tan (theta) = tan (180 - (beta + alpha)) but I dont get how it gets to the above
Nl90 wrote: » I'll tell what I know and hope it's correct They are asking for the angle of deflection which is theta It always equals (beta-alpha) You get beta by letting Vy/vx Alpha is the original angle And then you just apply the trig Tan (A-B)= bla bla bla "math table" Hope that helped
xJEx wrote: » yeah thanks, I knew that though I just don;t get WHY its always beta - alpha
Nl90 wrote: » I think if you draw it you'll understand it It's very confusing for me too You can say alpha was 30 and then the angle became 90 so what made the angle change from 30 to 90!? It's 60 I don't know if this is how the concept was explained because I studied it bymyself but it works
xJEx wrote: » But say alpha = 30 and theta = 70 that means beta must equal 80 so apparently tan(70) = tan(80-30) according to formula but that isnt true
Nl90 wrote: » If alpha = 30 And theta is =70 Then beta must be 100 Alpha is the original direction Beta is the new direction after deflecting Theta is the difference So Beta = alpha+theta You need to know in the Q whether they're asking for B or theta
JoeOBrien1 wrote: » Does anyone know where I can find past mock papers for applied maths? I've done the past papers back to about 1999 and 1994&1995. I'd rather get some new questions than go over some of them again. Also I don't really want to do questions past 1999 they're not to similar to the newer papers.
