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Reply 20
kais58
oh yeah, I forgot the formula book is actually useful in Fp1...


Yeh they are :wink: So do you see where I'm coming from now? I know it's an enlargement of scale factor 2 because the sine of an angle cannot be root(3) as that's too large, but root(3)/2.
Reply 21
This was by far the MOST easiest fp1 paper.
Reply 22
Just sat the exam, content-wise it was really easy but I found it a little time-consuming. Couldn't have asked for better though, 6 marks for forming a new equation with related roots, pfft.

I didn't have time to get the last 3 marks done but I may have been able to get 1 or 2 from formulating the quadratic needed.

Looking for a 96-98 to improve my 87. Hope you all did well.
Reply 23
The inequality one was quite tricky, I got 2<x<3 and x>3.5.

What was your answer for the trig question

I got 87 in Jan as well :biggrin:
Reply 24
chronicl3
The inequality one was quite tricky, I got 2<x<3 and x>3.5.

What was your answer for the trig question


I got those inequalities too, what trig question do you mean?

EDIT: I got 87 in June 09 but well done for it in Jan :smile: I heard bad things about that exam.
Reply 25
AshDonson
I got those inequalities too, what trig question do you mean?


Cos (5x-20)=cos 40

I think?
Reply 26
chronicl3
Cos (5x-20)=cos 40

I think?


Oh yeah, it's been like a year since I did general solutions so it might not be correct but I got

x = 12° ± (72n)°

Although '±' is old-fashioned and has been passed to me by my teacher, techincally 'n' can be positive or negative.
Reply 27
That's what I got hi5!

3.706 for the first question and the tangent stuff was (6,2) right?

I have those matran questions...
Reply 28
AshDonson
Oh yeah, it's been like a year since I did general solutions so it might not be correct but I got

x = 12° ± (72n)°

Although '±' is old-fashioned and has been passed to me by my teacher, techincally 'n' can be positive or negative.


I got (72n)° + ±
Reply 29
Lovely paper.
For the trig question didn't you have to do also:

Cos (5x-20)=cos 40
5x-20=-40
5x=-20+360n
x=-4+72n

That was the only bit, I wasn't 100% sure on..
Reply 30
Greg.
Lovely paper.
For the trig question didn't you have to do also:

Cos (5x-20)=cos 40
5x-20=-40
5x=-20+360n
x=-4+72n

That was the only bit, I wasn't 100% sure on..


What I did was:

5x - 20 = 40
5x = 60
x = 12

x = 360n/5 +- 12
x= 72n +-12
Reply 31
Zuzuzu
I got (72n)° + ±


Never seen a general solutions answer like that, but I may be wrong obviously

chronicl3, I got that answer for Euler's too.

EDIT: Ahh damn that negative cos part, like I said it's been a year so I forgot. Went to revise yesterday and realised I no longer had a text book, whoops.
Reply 32
To double check my GS, I plotted both graphs on a graphical calculator, and when n = 0, the x-co-ords of intersection are -4 and 12...
Reply 33
I forgot about the -ve part also, :frown:. Oh well 2 marks (?) lost
Reply 34
For the trig question I had:
x = 72n + 12 and x = 72n - 4
Anyone else get this?
Reply 35
haddaway
For the trig question I had:
x = 72n + 12 and x = 72n - 4
Anyone else get this?


Yes, I did.

There was a question of a similar form in one of the FP1 past papers (i.e. cos(something)=cos(something), but can't remember which it was, so can't find the mark scheme to see how the examiners mark it.
Reply 36
how about imaginary numbers question?
Reply 37
drgrievus
how about imaginary numbers question?


Can't completely remember, but something like y=10, x=5?
Reply 38
Greg.
Can't completely remember, but something like y=10, x=5?


Aye, that's what I got anyway...
Reply 39
From memory, I got:

1. 3.706

2. 5 + 10i

3. 12° + n72° and 68° + n72°

4. a = 0.36, b = 4.8

5. It was a fairly obvious show that question

6a. 45° anticlockwise rotation
b. A reflection in the line y = tan(22.5)x
c. 90° anticlockwise rotation
d. Identity matrix, therefore no effect.
e. Reflection in the line y = x

7. 2 < x < 3, or x > 7/2

8. 5x^2 - 24x + 72

9. The points of intersection were (6, 2) and (6, -2)


That's just from memory though, might have gotten some of the question numbers wrong!