Further Maths Help

[Odette]

joechan521 i think i got it,

becuase P is 152T its 62 past 90 where as M is 52 behind 90 (imagine 90 as being perpendicular with O) so that means P is closer to the vertical and M more 'further out' given there the same length..

i just had problem on which would be futher out the M or the P, geting the bearings from that is easy, thanks!

edit: oddete

i dont see how u got C for q4,core... did u do .5675 x (67.98/8.67) ??

and geo q1, x = 34.6/tan(23) ??

Sorry, made a mistake on Q4 of Core...
As for the Geo Q1=> I think it's tan 23=x/34.6  (depression not elevation) Could be wrong though :S lol

[kjg]

yeah this is completely testing my brain capacity

i just spent an hour finding the residual button

i already knew where it was
but now i am stressing haha

i hate residual plots

i dislike calculators because they don't do what i try to get them to do

[Odette]

yeah this is completely testing my brain capacity

i just spent an hour finding the residual button

i already knew where it was
but now i am stressing haha

i hate residual plots

i dislike calculators because they don't do what i try to get them to do

Lol...

[kjg]

yeah really not looking forward to this
not to mention i have a nagging little brother pestering me every 5 minutes

not the best place to try and study, at home

[maxleng]

joechan521 i think i got it,

becuase P is 152T its 62 past 90 where as M is 52 behind 90 (imagine 90 as being perpendicular with O) so that means P is closer to the vertical and M more 'further out' given there the same length..

i just had problem on which would be futher out the M or the P, geting the bearings from that is easy, thanks!

edit: oddete

i dont see how u got C for q4,core... did u do .5675 x (67.98/8.67) ??

and geo q1, x = 34.6/tan(23) ??

Sorry, made a mistake on Q4 of Core...
As for the Geo Q1=> I think it's tan 23=x/34.6  (depression not elevation) Could be wrong though :S lol

hmm, did u measure from the horizontal, then using co interior angles, 23 will be bottom right angle (hard to explain w/o drawing) so opp=34.6 and adj=x

TOA => tan(23) = 34.6/x

[Odette]

joechan521 i think i got it,

becuase P is 152T its 62 past 90 where as M is 52 behind 90 (imagine 90 as being perpendicular with O) so that means P is closer to the vertical and M more 'further out' given there the same length..

i just had problem on which would be futher out the M or the P, geting the bearings from that is easy, thanks!

edit: oddete

i dont see how u got C for q4,core... did u do .5675 x (67.98/8.67) ??

and geo q1, x = 34.6/tan(23) ??

Sorry, made a mistake on Q4 of Core...
As for the Geo Q1=> I think it's tan 23=x/34.6  (depression not elevation) Could be wrong though :S lol

hmm, did u measure from the horizontal, then using co interior angles, 23 will be bottom right angle (hard to explain w/o drawing) so opp=34.6 and adj=x

TOA => tan(23) = 34.6/x

No no um it was A=34.6 O=x lol ...

Code: [Select]


   23 degrees (*)
      *
      |\
 34.6 | \
      |__\
        x


If that makes sense lol ..

[maxleng]

edit: ur measuring the angle of depresion wrong, it has to be measured FROM THE HORIZONTAL  

[Odette]

(Image removed from quote.)

edit: ur measuring the angle of depresion wrong, it has to be measured FROM THE HORIZONTAL  

Oh i see ... lol

[Defiler]

Thanks for the help on the last questions... I just have 2 more questions.

Further maths exam (VCAA) '05

Core - Q10
Graphs - Q9

Thanks for any assistance!

Edit: I am doing the further vcaa exams '02 to '04 right now so if I come across anymore 'tricky' ones I'll post them up, begging for help.  

Double Edit: Does anyone have any 'commercial' modules (other than neap and itute) for matrices? I feel like doing just 2 or 3 modules of that isn't enough. Ta!

[Odette]

Thanks for the help on the last questions... I just have 2 more questions.

Further maths exam (VCAA) '05

Core - Q10
Graphs - Q9

Thanks for any assistance!

Edit: I am doing the further vcaa exams '02 to '04 right now so if I come across anymore 'tricky' ones I'll post them up, begging for help.  

Double Edit: Does anyone have any 'commercial' modules (other than neap and itute) for matrices? I feel like doing just 2 or 3 modules of that isn't enough. Ta!

Can you like post the questions because vcaa site isnt working atm ... ?

[Odette]

CORE-
Qn 10-
B. x-points : 1,2,3,4,5 => median is 3
    y-points : 0,1,2,4,5 => median is 2
    coordinates: (3,2)

GRAPHS-
Qn 9-
A. I= k/d^2
    20 x 50^2 =k
    50000 =k
(5,2000) => 2000=k/5^2
                  50000=k
Therefore the coordinates satisfy the equation (hope that makes sense)

Hope that helps sorry about the delay, I only got the VCAA 05 Exam

[SilverBullet]

Can we take in potractors?

[Dolche]

For the matrices question, we know that a unique solution is when the determinant does not equal to 0.

x=8,y=2 is a unique solution as they have already told us that x is 8 and y is 2 thus no need to apply the rule (det=ad-bc)

I think thats right?

i got question 9 wrong (2006 VCAA-matrices). if you put the values into the calc T^50, T^60 etc the figures keeps on increasing so shouldn't the answer be E-gradually increases?

[Dolche]

Is the trial exam (2007) from itute meant to be hard? vcaa exams will generally be of a lower standard (in terms of difficulty) than commercial papers?

[Odette]

Is the trial exam (2007) from itute meant to be hard? vcaa exams will generally be of a lower standard (in terms of difficulty) than commercial papers?

VCAA exams are easier than most commercial papers
I think you can bring in a protractor, not sure though =]