# General Thoughts: Mathematics (1 Viewer)

#### jmel93

##### New Member
Well my school tends to rank pretty well, last year we were 42nd in the state and the year before we were 7th, I ranked 29th out of 45 I think, but that's about average in the 2 unit class, in reality I got somewhere between 71 and 76

#### friend177

##### Member
omg, just realised that the 1 marker for y=2cosx graph asked for the COORDINATES of the point at the y axis. I only wrote '2', not (0,2)... do you still think i can get that 1 mark?
Holy shit I think I wrote 2 that's it i forgot to put the x coordinate ahhhhhh FML

Man I sincerely hope the markers let us off with that one...I mean it's obvious it's 0 in the x axis ....oh god 1 mark gone ...SHIT..anyone did the same silly mistake? Or you reckoned te markers will understand what our point is?

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#### lilcherub

##### New Member
did anyone else go wth is a paraboloid????

#### Proteus

##### Member
did anyone else go wth is a paraboloid????

yep, so what's the ratio of it to the cylinder?

H

#### hahhahaha

##### Guest
Holy shit I think I wrote 2 that's it i forgot to put the x coordinate ahhhhhh FML

Man I sincerely hope the markers let us off with that one...I mean it's obvious it's 0 in the x axis ....oh god 1 mark gone ...SHIT..anyone did the same silly mistake? Or you reckoned te markers will understand what our point is?

HAHA u suck.

#### Entity

##### Member
I got 1: root2? FFFFFUUUUU-

#### danjw

##### Member
Holy shit I think I wrote 2 that's it i forgot to put the x coordinate ahhhhhh FML

Man I sincerely hope the markers let us off with that one...I mean it's obvious it's 0 in the x axis ....oh god 1 mark gone ...SHIT..anyone did the same silly mistake? Or you reckoned te markers will understand what our point is?

I did the same haha FUCK.
Overall exam was a lot better then expected but is question 9 the new question 10 or what!?

##### New Member
I got 1: root2? FFFFFUUUUU-
O_______O i still had Hs and Cs in there.
1: 2H²C² / h anyone?

and how did you get theta=2 radians? :S

edit: nvm. it's not 1: 2H²C² / h.

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#### Entity

##### Member
O_______O i still had Hs and Cs in there.
1: 2H²C² / h anyone?

and how did you get theta=2 radians? :S

edit: nvm. it's not 1: 2H²C² / h.
I got theta = 2 radians yeah... but I don't know how I did it now LOL. You don't include C, you've an definate integral...

#### damo_g

##### Member
and how did you get theta=2 radians? :S
When you worked out r in terms of P that gave the max area in (iii), you get r = P/4 (4r = P).

But P= r(theta + 2), from (i)

4r = r(theta + 2)
4 = theta + 2
theta = 2.

I didn't even realise you could use part (i) to work it out. I forget exactly how i did it, but i used the equation for the area in (ii) and another equation and ended up with theta = 2 anyways but it just took longer.

Also, in the paraboloid question i got the ratio as 1:2.

#### 13abie

##### Member
Did anyone else do what I did? On the social networking question I thought it said 0.5 dollars instead of 0.5 cents, so my answer was wrong! -2 just like that!
I think worst case scenario Ill get 105, best case 113. My internal rank will be worst case 89 best case 91, so hopefully I can take a HSC mark of 92-93! One unit might not count anyway!

Not happy or unhappy with this one

#### Entity

##### Member
LOL SORRY I was looking at the wrong question... But I did get 2 Rads in q10 (b) iii. using i.

#### PaterzAttack

##### fake based bitch
omg, just realised that the 1 marker for y=2cosx graph asked for the COORDINATES of the point at the y axis. I only wrote '2', not (0,2)... do you still think i can get that 1 mark?
fuck -.- i just realised that i did the same thing....

#### damo_g

##### Member
Did anyone else do what I did? On the social networking question I thought it said 0.5 dollars instead of 0.5 cents, so my answer was wrong! -2 just like that!
You should still pick up a mark because the sequence would still be the same, just the wrong value in the end. You would have just ended up with the amount of cents, in dollars.

#### Awkward_Ninja

##### Member
I think i may or may not have written the coordinates around the wrong way. I think i did (2,0) instead of (0,2).
I'm hating my life.

#### Proteus

##### Member
I think i may or may not have written the coordinates around the wrong way. I think i did (2,0) instead of (0,2).
I'm hating my life.
dw

Silly mistakes cost most people marks, so it's not just you!

#### Awkward_Ninja

##### Member
dw

Silly mistakes cost most people marks, so it's not just you!
20-25 marks of silly mistakes is a fair bit. 16-20% roughly.

#### jgalpin

##### New Member
'C' comes from the equation of the line x=c, to find volume around the y axis u need x^2, so x^2=c^2. Integrating this u get c^3 / 3 between o and h

#### Awkward_Ninja

##### Member
Question 10 with the paddock was the end of me. Maybe 2/7 marks there.