A2 Maths paper 3

[economist2]

Wait what was your code again? 33? Mine was 32!

how was it?I couldnt finish the itantheta one.was the vector eqn of the plane 4x+z=9?

 

[hEbBoOo]

how was it?I couldnt finish the itantheta one.was the vector eqn of the plane 4x+z=9?

Sorrowfully, I didn't manage to come across this question as time was horrible, but anyways itan(theta) is the question that got me late while answering!

 

[economist2]

Sorrowfully, I didn't manage to come across this question as time was horrible, but anyways itan(theta) is the question that got me late while answering!

hmm.I couldnt do the circle (i) as well.did you do (i) of the vectors question?

 

[asenfire]

how was it?I couldnt finish the itantheta one.was the vector eqn of the plane 4x+z=9?

thats right the equation is absolutely correct

 

[SB29597]

okay. Guess that paper 32 will be easy.

It wasnt.

Did you find it easy?

 

[Mohammad Harb]

Took paper 32..It was very hard. :l i think i lost more than 25 marks

 

[aniroula]

It wasnt.

Did you find it easy?

Nope. It was very hard. I lost marks in differentiation,polynomial,vector,circle and complex number. The paper was pathetic. How did your go?

 

[aniroula]

thats right the equation is absolutely correct

I used the co ordinate of y axis as (0,1,1) instead of (0,0,1)

 

[economist2]

thats right the equation is absolutely correct

thanks bro.and also,what was the exact value in (i) of vectors...I got 17degrees......not exact

 

[economist2]

I used the co ordinate of y axis as (0,1,1) instead of (0,0,1)

could you do vectors q.(i) the exact value of the angle.my answer wasnt exact...17 degrees.

 

[economist2]

what do you guys think the gt will be?

 

[fcbayernmunchen]

poor paper :'( I have discussed with like 20-25 people and most of them think the threshold will lie around 35-45/75 !

 

[fcbayernmunchen]

sorry I don't remember my variant; my first solution (inequalities) was:- (1/4)a<x<(5/2)a (confirmation pls?)
the angle between AB and BC (vectors) was cos(•)=20/21 (confirmation pls?)
pfff too many mistakes from the rest of my attempts :|
I even failed to apply DIFFERENTIATION in the polynomial one ( f ' (x) ) :'(

 

[SB29597]

Sorrowfully, I didn't manage to come across this question as time was horrible, but anyways itan(theta) is the question that got me late while answering!

You got that? Can you walk me through the answer? Inbox me if you dont want to post it up. I'm freaking out about it.

 

[hEbBoOo]

sorry I don't remember my variant; my first solution (inequalities) was:- (1/4)a<x<(5/2)a (confirmation pls?)
the angle between AB and BC (vectors) was cos(•)=20/21 (confirmation pls?)
pfff too many mistakes from the rest of my attempts :|
I even failed to apply DIFFERENTIATION in the polynomial one ( f ' (x) ) :'(

So that was varient 32? Anyways, I got the cos(theta) = 12/21 I guess I migh be wrong with that! well the differentiation in the polynomial was straightforward IMO -it didn't need that much of work anyways sad to hear you failed to do it
Well as for the first inquality I can't remember it at ALL! It's one of the first done questions so yeah! xD
What did you in question 8 (ii) was it Pi -1? :/

 

[fcbayernmunchen]

So that was varient 32? Anyways, I got the cos(theta) = 12/21 I guess I migh be wrong with that! well the differentiation in the polynomial was straightforward IMO -it didn't need that much of work anyways sad to hear you failed to do it
Well as for the first inquality I can't remember it at ALL! It's one of the first done questions so yeah! xD
What did you in question 8 (ii) was it Pi -1? :/

I'm afraid not :''( It was very poor I don't want to recall ((

 

[thementor]

So that was varient 32? Anyways, I got the cos(theta) = 12/21 I guess I migh be wrong with that! well the differentiation in the polynomial was straightforward IMO -it didn't need that much of work anyways sad to hear you failed to do it
Well as for the first inquality I can't remember it at ALL! It's one of the first done questions so yeah! xD
What did you in question 8 (ii) was it Pi -1? :/

I'm afraid not :''( It was very poor I don't want to recall ((

cos (BAC) = 20/21
Screwed up the polynomials one. What was the answer of cos(x +30) = 2cos x
oh and the area in 8 (ii) was 2pi - 4. This is confirmed.

 

[hEbBoOo]

You got that? Can you walk me through the answer? Inbox me if you dont want to post it up. I'm freaking out about it.

Don't want to post it up? I will post it up of course! It'll take some time though.

 

[hEbBoOo]

cos (BAC) = 20/21
Screwed up the polynomials one. What was the answer of cos(x +30) = 2cos x
oh and the area in 8 (ii) was 2pi - 4. This is confirmed.

Really? I have 3 answers wrong till now :/ As for the cos(x+30)=2cosx actually I can't remember it but I expanded and finished it I guess it was square root(3) - 4 though!

 

[SB29597]

Don't want to post it up? I will post it up of course! It'll take some time though.

Can you do it tonight? I would really like to know before I sleep, I'm so worried.