SPECIALIST MATHEMATIC 2009 EXAM ONE

[GerrySly]

oh ok thank you......that makes me feel better...........lol..........anyway.......can i ask if you accelarates downward..........is it a or -a

Depends if you set up as positive then it would be -a.

If up is negative then it'd be +a.

What if you didn't define up and down? I just used the wording of the question, one was up one was down therefore one was negative and one was positive. Missed marks for answer?

for the cis (theta) question

I got

- square rt (7/8) + square rt(1/8) i

Heh I did exactly the same I think, fark

[NE2000]

There was quite a few things which were missing (which is inevitable I guess). But mechanics, graphs, vector calculus were major absences.

[brenny]

Gerry Sly
-square rt (7/8) + square rt (1/8)i is correct

try is on the calculator let inverse cos= 3/4 and then divide the angle by 2 to get the angle require then cos of that and sin of that i is the answer you have above. i got that also

[GerrySly]

Gerry Sly
-square rt (7/8) + square rt (1/8)i is correct

try is on the calculator let inverse cos= 3/4 and then divide the angle by 2 to get the angle require then cos of that and sin of that i is the answer you have above. i got that also

Yeah but it's not simplified so you will probably lose some marks

[ayu]

Gerry Sly
-square rt (7/8) + square rt (1/8)i is correct

try is on the calculator let inverse cos= 3/4 and then divide the angle by 2 to get the angle require then cos of that and sin of that i is the answer you have above. i got that also

Gerry Sly

PHEW~~

[brenny]

Gerry Sly
-square rt (7/8) + square rt (1/8)i is correct

try is on the calculator let inverse cos= 3/4 and then divide the angle by 2 to get the angle require then cos of that and sin of that i is the answer you have above. i got that also

Yeah but it's not simplified so you will probably lose some marks

yeh maybe i got it in a different form i got -square rt(14)/2 + square rt(2)/4

equals the same thing just little more simplified

[vcestudy123]

http://www.itute.com/2009/10/30/free-download-2009-vcaa-specialist-mathematics-examination-1-solutions/
itute solutions are up
enjoy

[arthurk]

Gerry Sly
-square rt (7/8) + square rt (1/8)i is correct

try is on the calculator let inverse cos= 3/4 and then divide the angle by 2 to get the angle require then cos of that and sin of that i is the answer you have above. i got that also

Yeah but it's not simplified so you will probably lose some marks

yeh maybe i got it in a different form i got -square rt(14)/2 + square rt(2)/4

equals the same thing just little more simplified

lol got the same
u guys stressed me out when u had answers in different form lol
gradient got -6 eulers got 0.8

[arthurk]

oh shit they got root 14/4 i got root 14/2 i think oh shit gg
Edit : actually i cant remember

[ayu]

....wow...i've made sooooo many stupid mistakes.....cos is -ve in 2nd quad, god dammit!!!!
argh....now i'm misssing on an A....
heck....and i felt good about it straight after exam

ahhh crap!! m was just a number...i treated it as something like x...crappp

[sachinmachin]

would you get a mark for showing cis(theta) = cos(theta) + isin(theta) in your method. i subbed in wrong values though

[brenny]

for question 6 i got m=-2 and 5 but for some reason when e^(mx)=0 i took m=1 dont ask me why? my teacher said i might not lose a mark though what do others think?

[NE2000]

A question: when it asked you to verify solution is it fine to 'show that' it is a solution. So for the (0,4) is a y-intercept question is it fine to just let x = 0 and find that (0,4) and (0,1) are the intercepts as opposed to LHS = ... = RHS. A bit scared about this lol

[TrueTears]

for question 6 i got m=-2 and 5 but for some reason when e^(mx)=0 i took m=1 dont ask me why? my teacher said i might not lose a mark though what do others think?

What did you write as your final answer? If you had m = -2, 5, 1 then yes you'd lose a mark since that's incorrect answer.

[brenny]

for question 6 i got m=-2 and 5 but for some reason when e^(mx)=0 i took m=1 dont ask me why? my teacher said i might not lose a mark though what do others think?

What did you write as your final answer? If you had m = -2, 5, 1 then yes you'd lose a mark since that's incorrect answer.

what i exactly wrote was      e^(mx)=0 x-5=0 x+2=0
                                           x=1       x=5     x=-2