Maths ext 2 trial (1 Viewer)

[peepeepoopooo]

Completed the CSSA Maths ext 2 trial on Monday was curious of what other people thought of it, I found most of the q)16 very challenging except for the cos integration

 

[xoNat]

Completed the CSSA Maths ext 2 trial on Monday was curious of what other people thought of it, I found most of the q)16 very challenging except for the cos integration

I found it really challenging
Walked up to this girl in my class after and we just started laughing

 

[tywebb]

Well I thought they could have found a better way to find the minimum distance between skew lines.
Here is my alternative solution to 15ciii which is much more efficient than the method in the paper, and also doesn't rely on any previous parts either.

 

[tywebb]

Hey how about 16a. The official solutions are very long. You can do it in 1 line like this:

 

[tywebb]

Here is another shorter way, but less algebraic, more of a combinatorial approach.

if you have m girls and n boys, you can line them up in m!n! ways such that all girls come before all boys, and in (m+n)! ways without that restriction.

Hence m!n!<(m+n)!

 

[tywebb]

They took 8 pages to get up to 12b. I did all that in 1 page. Here are the rest of my solutions, many of which are quite different to the official ones

https://4unitmaths.com/cssa-2024-e2-sol-tywebb.pdf

Haven't checked for typos though. I'll do that tomorrow.

 

[Average Boreduser]

They took 8 pages to get up to 12b. I did all that in 1 page. Here are the rest of my solutions, many of which are quite different to the official ones

https://4unitmaths.com/cssa-2024-e2-sol-tywebb.pdf

Haven't checked for typos though. I'll do that tomorrow.

wait so why did u use hyperbolic trig for 7.? Wouldn't that require you to prove its properties to actually use it? Wouldn't it be easier to use in syllabus mthods? I was just wondering since theres already complexity in there being hyperbolic trig, but now theres also a complex number inside the function so like surely this wouldn't suffice in a real exam?

 

[tywebb]

wait so why did u use hyperbolic trig for 7.? Wouldn't that require you to prove its properties to actually use it? Wouldn't it be easier to use in syllabus mthods? I was just wondering since theres already complexity in there being hyperbolic trig, but now theres also a complex number inside the function so like surely this wouldn't suffice in a real exam?

makes it quicker

cosh(ix)=cos(x)

 

[tywebb]

also you know it is going to be much easier if the i is in the cosh than if it isn’t

think about it

what is going to happen if the i is in the cosh? imaginary parts cancel and it simplifies

what is going to happen if the i isn’t in the cosh? nothing! so nothing cancels.

 

[ivanradoszyce]

Any change of putting a link so I can see the paper?

 

[tywebb]

Any change of putting a link so I can see the paper?

although the security period is over one refrains from putting paper up here

....... papers that are protected by copyright (including CSSA) cannot be shared on here ......

 

[peepeepoopooo]

Any change of putting a link so I can see the paper?

Maybe try Studeco they don't seem to care as much.

 

[tywebb]

Some copyrighted papers are legally available to download, as the copyright holder allows them to be downlaoded like the western maths: http://www.westmaths.com.au/home/ or next education: https://www.nexteducation.com.au/resources

but most commercial trials don't have this somewhat better attitude

 

[tywebb]

Well I thought they could have found a better way to find the minimum distance between skew lines.
Here is my alternative solution to 15ciii which is much more efficient than the method in the paper, and also doesn't rely on any previous parts either.
View attachment 43932

here is another way:


and i added it to https://4unitmaths.com/cssa-2024-e2-sol-tywebb.pdf

So they did it in 1½ pages and I can do it in 1 line! .......... haha

 

[tywebb]

Here's subtle question.

 

[jonolad69]

is 82% a good mark for cssa 2024 mx2 trial

 

[WeiWeiMan]

Any change of putting a link so I can see the paper?

check on ********** in #mathematics-4u

 

[H.S. Carslaw]

here is another way:

View attachment 43944
and i added it to https://4unitmaths.com/cssa-2024-e2-sol-tywebb.pdf

So they did it in 1½ pages and I can do it in 1 line! .......... haha

Hey that groovy man. How the f**k do you do that?

 

[tywebb]

Hey that groovy man. How the f**k do you do that?

with my fingers and keyboard and latex dude

 

[JIMIN123409]

have you gotten results back?