2012 CSSA Maths 2U (3 Viewers)

[Kimyia]

Re: Thoughts on CSSA 2U Mathematics Exam??

I found Question 15 harder than Q 16 ....

same! yeah, that part A of question 15 had me stumped for a while but I think I worked it out. I found Q16 fine...except that sophie probability one (which ever question that was from). That test only increased my dislike for probability :\

 

[Kimyia]

any body know how to do the final probablity questions which asks what is the probability that sophie wins? how do you do it if the discs are replaced and there are infinite turns?

omg yes, i hated that question :\ Didn't have a clue what it was asking or how to work it out. Oh well

 

[Demise]

Probability was easy, it's a GP with 4/7 as a, 4/7 x 3/7 as R. Then do sum to infinity.

 

[Kostie100]

Re: Thoughts on CSSA 2U Mathematics Exam??

I would say i got 70-80/100

 

[Kimyia]

Probability was easy, it's a GP with 4/7 as a, 4/7 x 3/7 as R. Then do sum to infinity.

:O Your kidding. lol never thought of that

 

[Kostie100]

Re: Thoughts on CSSA 2U Mathematics Exam??

same! yeah, that part A of question 15 had me stumped for a while but I think I worked it out. I found Q16 fine...except that sophie probability one (which ever question that was from). That test only increased my dislike for probability :\

What was 15.A?

 

[iBibah]

If you guys would like I could show you how to do the probability one and the circle one?

EDIT: beaten, but yes what demise said.

Watch this vid for a proof of the cos identity proven in Q16: http://virtualb15.edublogs.org/2012/05/21/compound-angles/

 

[Roy216]

Probability was easy, it's a GP with 4/7 as a, 4/7 x 3/7 as R. Then do sum to infinity.

Never thought of that, i just put in 4/7 because i had no clue

 

[Demise]

If you guys would like I could show you how to do the probability one and the circle one?

Circle one please.

 

[Demise]

Never thought of that, i just put in 4/7 because i had no clue

Haha man I did terrible for q16c and q15a .

 

[will_]

Probability was easy, it's a GP with 4/7 as a, 4/7 x 3/7 as R. Then do sum to infinity.

fark so the answer is 28/37?

damn it

 

[iBibah]

Circle one please.

http://virtualb15.edublogs.org/2012/05/21/compound-angles/

This is basically what the question did. At the start of the vid he proves the cos(a-b) identity which is what the circle question was essentially asking to prove.

 

[iBibah]

fark so the answer is 28/37?

damn it

yep thats it. I felt like an idiot cause when we finished i realised i made a mistake.

 

[will_]

i had the idea that limiting sum was somehow involved but i did it wrong.

whats the reason why r=3/7x4/7?

 

[Genero]

Re: Thoughts on CSSA 2U Mathematics Exam??

Question 16 was fairly easy for me but for some reason, I didn't see the tan substitution thing in question 15 (the one with the cylindrical thing in the roof) -.- I should have been able to see that. Overall, pretty sure I made a lot of silly mistakes. I think I counted around 4/5 marks lost , though I'd probably lose a lot more marks. That probability question was fine for me, the method was similar to one of the past CSSA papers (I think it was the 2000 paper, question 10). Hoping for 90+% ahah.

 

[rsagar]

Re: Thoughts on CSSA 2U Mathematics Exam??

I've heard that Independent is harder than CSSA.

The new format screws head... seriously... How are we meant to answer Q's
that are given to us simultaneously... Did anyone else pickup the order ???

@Lucas... dude, dw.
Just do past paper questions +
(hint hint) make sure you do more Q's 6-10 than 1-5 in past papers...
trust me :J and good luck

 

[RealiseNothing]

That circle question is the reason why you learn the proofs and derivations of things instead of rote learning (at mx1 kids)

Most mx1 students should have seen the proof before.

 

[Kimyia]

Re: Thoughts on CSSA 2U Mathematics Exam??

What was 15.A?

I think it was 15 (a)....it was that cylinder one, proving the h

 

[RealiseNothing]

yep thats it. I felt like an idiot cause when we finished i realised i made a mistake.

Can you (or anyone else) post up the probability question?

 

[Roy216]

Haha man I did terrible for q16c and q15a .

what was 16c and 15a?