Mathematics Advanced Predictions/Thoughts (4 Viewers)

[Arthur Haddad]

If you drew the graph for the Ferris wheel question and got the intersection points from that would they give you the 4 marks?

 

[kizmalah11]

Hey guys, I sat the math advanced paper yesterday and after looking over the answers, predict I got around 75-80. Any thoughts on what this will scale to my exam mark.

 

[nonya2000]

If you drew the graph for the Ferris wheel question and got the intersection points from that would they give you the 4 marks?

I did that too, I hope they give 2 marks for that instead of just 1

 

[ax_l]

Hey guys, I sat the math advanced paper yesterday and after looking over the answers, predict I got around 75-80. Any thoughts on what this will scale to my exam mark.

maybe somewhere in the mid80s to low 90s i reckon

 

[nonya2000]

If you drew the graph for the Ferris wheel question and got the intersection points from that would they give you the 4 marks?

Also they never taught us the identity: If cos(ax+b) = cos(c) then ax+b = c. So I don't understand why some solutions use that

 

[kizmalah11]

maybe somewhere in the mid80s to low 90s i reckon

Thank you

 

[shoulfer]

Also they never taught us the identity: If cos(ax+b) = cos(c) then ax+b = c. So I don't understand why some solutions use that

that's not an identity mate that's common sense

 

[nonya2000]

that's not an identity mate that's common sense

I know if ln(ax+b)=ln(c) ax+b=c and if a^mx+b=a^c then mx+b=c but I didn't know it would apply to trigonometry too cause I never came across any past paper with that type of trigonometric equation

 

[Average Boreduser]

that's not an identity mate that's common sense

not neccessarily true and I don't think that 'identity' is even correct. The cos function has several cycles so the angles aren't neccessarily the same for the eqn that was given... you'd need to prove that the +2npi cases do not contribute...

 

[shoulfer]

not neccessarily true and I don't think that 'identity' is even correct. The cos function has several cycles so the angles aren't neccessarily the same for the eqn that was given... you'd need to prove that the +2npi cases do not contribute...

exactly you have to think about the cosine and sine functions, also the 2npi cases don't contribute since they lie outside of the first full rotation

 

[Average Boreduser]

exactly you have to think about the cosine and sine functions, also the 2npi cases don't contribute since they lie outside of the first full rotation

mb i only saw the 'identity' not the qn yall are talking ab. I lowkey just brute forced using compound angle

 

[Arthur Haddad]

I did that too, I hope they give 2 marks for that instead of just 1

I don’t see why they wouldn’t give the four marks if you correctly graphed it and got the correct heights. Can anyone change my mind

 

[nonya2000]

I don’t see why they wouldn’t give the four marks if you correctly graphed it and got the correct heights. Can anyone change my mind

They asked for decimals, which you can't get if you graph it since it wont be completely accurate

 

[Arthur Haddad]

They asked for decimals, which you can't get if you graph it since it wont be completely accurate

You find the times where they intersect exactly being 3 and 27 and then sub those in to the equation to get the exact heights

 

[nonya2000]

You find the times where they intersect exactly being 3 and 27 and then sub those in to the equation to get the exact heights

i thought the intersection points weren't exact? nvm I should have shifted it by a multiple of pi for this example

 

[shoulfer]

I don’t see why they wouldn’t give the four marks if you correctly graphed it and got the correct heights. Can anyone change my mind

they probs will they have in the past

 

[FudiddidoAdrian]

Guys for the probability one if j showed full working out and got 9.9 but said 9 instead of 10 do i lose marks

 

[shoulfer]

Guys for the probability one if j showed full working out and got 9.9 but said 9 instead of 10 do i lose marks

yes just 1 tho for not having the correct final solution, why did you do that tho

 

[FudiddidoAdrian]

yes just 1 tho for not having the correct final solution, why did you do that tho

lmaooo cus im dumbbb surely its like last yr where 36/37 koalas accepted

 

[99.95 atar come my way]

Guys for the probability one if j showed full working out and got 9.9 but said 9 instead of 10 do i lose marks

nah i did the same i forgot to flip the sign cause i left it as ln something and forgot its a negative number