exam1 thoughts + answer

[*insert witty name here*]

What u guys rekon the cut off for A+ will be this year, last year it was 73/80

i say so. 'boulos' your name sounds so familiar! hey, is that your surname..and do you go to mazenod?!

[*insert witty name here*]

ah yeh..AND what do you need to get 40 study score?

[cara.mel]

peeps,

anyone know how much that tan graph we had to draw was worth?

1 mark.
glad it wasn't more, someone completely forgot the 1/2 bit when drawing it ^_^


Oh question:
For the last one I am sure I had tan x = (-14 ? 18 )/ 8 sqrt 2, tan x = 4/8 sqrt 2 because it has to be +ve, after that I am not too sure what I did
Would I get 1 or 2 marks for getting tan x in an unsimplified form, and trying to draw a triangle to find sin x but completely stuffing up everything past there (I think (4 rt 2)^2 ended up being 64 x_X)

[boulos90]

What u guys rekon the cut off for A+ will be this year, last year it was 73/80

i say so. 'boulos' your name sounds so familiar! hey, is that your surname..and do you go to mazenod?!

Nah thats my Lebanese name, and no i don't go to mazenod, lol havent even heard of that school!

Im feeling shitty, not because i think ive dropped about 5 marks on this exam, but because if ive dropped 5 marks on "Exam 1" imagine how much i'd  drop on exam 2

[Collin Li]

peeps,

anyone know how much that tan graph we had to draw was worth?

1 mark.

[joechan521]

are we supposed to draw the tan graph with asymptote at -pi/2
and also the part of the graph at the left of the asymptote?

[Ahmad]

x/2 - pi/4 = Arctan[y]

And we know the range of Arctan[y].

-pi/2 <= Arctan[y] <= pi/2
-pi/2 <= x/2 - pi/4 <= pi/2
-pi/2 <= x <= 3pi/2

[joechan521]

x/2 - pi/4 = Arctan[y]

And we know the range of Arctan[y].

-pi/2 <= Arctan[y] <= pi/2
-pi/2 <= x/2 - pi/4 <= pi/2
-pi/2 <= x <= 3pi/2

arghh shit, i knew there was something dodgy about my graph

[Galelleo]

On the final question, how many marks will i get for drawing the tan2x triangle, and then using both cos2x and sin2x to make up a simultaneous equation that would have eventually given me sinx, if i hadnt run out of time.

Also, did anyone else find that to be rather lengthy compared to previous years ?

gl all with exam 2

[joechan521]

On the final question, how many marks will i get for drawing the tan2x triangle, and then using both cos2x and sin2x to make up a simultaneous equation that would have eventually given me sinx, if i hadnt run out of time.

Also, did anyone else find that to be rather lengthy compared to previous years ?

gl all with exam 2

i think definently 1 mark, 2 marks depence where u up 2 in your working
i didnt think u need sin2x, just use cos2x = 1-sin^2(x)

and exam2 is ages away

[Galelleo]

damn, didnt even think of that at the time... ah well.

cheers... hey i hear you know Sleepii ;P?

[Bombers]

damn, didnt even think of that at the time... ah well.

cheers... hey i hear you know Sleepii ;P?

What did evryone get for question three.
The equation of the tangent.
I got y=3(x-1)

[Galelleo]

dy/dx ='d 3 at the given point... so y=3x+c , then sub the p(2,3) for x,y

3=3(2)+c
3=6+c
c=-3

soooo

y=3x-3
=3(x-1)

[joechan521]

damn, didnt even think of that at the time... ah well.

cheers... hey i hear you know Sleepii ;P?

sleepii u mean leslie from my school?

[Galelleo]

yeah lol

he was just talking about you + spec exam 1