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# The Official Edexcel P2 Revision Thread! (20/06/05 AM) watch

1. (Original post by tiger_j000)
Whats the difference with c2 and p2, is it two sepearte papers
C2 - New Spec

P2 - Old Spec

Most of the P2 stuff is actually on C3 not C2.
2. http://www.edexcel.org.uk/VirtualContent/25605.pdf

all ya need
3. Ok... i will do

And P2 does exist (LOOK AT THE TITLE OF THE THREAD!) it's only that you in the lower six do an easier course where you have effectively get P1, P2 and P3 in 4 modules and have to do one less applied module! Though i quite like M2 though so i dont really know if that's a better combination.
4. Just done the test in the back of the textbook and found a few problems.

6) The diagram shows a sketch of the curve with equation y = 2x - 10lnx - 3 which crosses the x-axis at A and B. At the point C y takes its minimum value.

b) Given that the x-coordinate of B lies in the interval [N, N+1] where N is an integer, find the value of N.
5. (Original post by !Laxy!)
C2 - New Spec

P2 - Old Spec

Most of the P2 stuff is actually on C3 not C2.
Agreed. As really: C1 + C2 = P1

C3 = P2

and C4 = P3
6. Woo, P2! In't it great?
7. Nice thread! I got it next week too, then S2 two days later.

Chris If you still need the mark scheme for 2005, PM me your email!
8. (Original post by Cartouche)
Woo, P2! In't it great?
not really =|
9. Found a few small questions I'm not sure about.

P2 Mock Paper

Find, giving your answer to two decimal places, the value of z for which:

cosz + sinz = 1/3, -pi < z < pi

P2 June 2001

Can't do the bit in bold.

2) The root of the equation f(x) = 0, where

f(x) = x + ln2x - 4

is estimated using the interative formula xn+1 = 4 - ln2x, with x0 = 2.4,

a) Showing your values of x1, 2, x3..., obtain the value, to 3 decimal places, of the root.

b) By considering the change of sign of f(x) in a suitable interval, justify the accuracy of your answer to part (a).
10. (Original post by Chris87)
Found a few small questions I'm not sure about.

P2 Mock Paper

Find, giving your answer to two decimal places, the value of z for which:

cosz + sinz = 1/3, -pi < z < pi
Use

A cos x + B sin x = R cos(x - @) where

[email protected] = B/A and R^2 = A^2 + B^2
11. (Original post by Chris87)
a) Showing your values of x1, 2, x3..., obtain the value, to 3 decimal places, of the root.

b) By considering the change of sign of f(x) in a suitable interval, justify the accuracy of your answer to part (a).
Say you found that the root was

0.3672873...

Then to 3dp you think the answer is 0.367

Well work out the function at 0.3675 and 0.3665 and if there is a sign change between the two then there is definitely a root there. And any such number between those values is 0.367 to 3 dp
12. (Original post by Chris87)
Found a few small questions I'm not sure about.
P2 Mock Paper
Find, giving your answer to two decimal places, the value of z for which:
cosz + sinz = 1/3, -pi < z < pi
P2 June 2001
Can't do the bit in bold.
I should stick to mathtype if people want help with questions in the same week that they post them.
The cos[z-(pi/4)] took me a while to produce and for some reason it wouldn't display very well if I included the expression on two lines without leaving a line space.
The (sina)/(cosa)=tana wouldn't work in fraction mode either, which is annoying.
Attached Images
13. LaTeX1.pdf (31.2 KB, 916 views)
14. (Original post by Gaz031)
I should stick to mathtype if people want help with questions in the same week that they post them.
The cos[z-(pi/4)] took me a while to produce and for some reason it wouldn't display very well if I included the expression on two lines without leaving a line space.
The (sina)/(cosa)=tana wouldn't work in fraction mode either, which is annoying.
Thanks Gaz031, very well explained.
15. (Original post by Chris87)
Thanks Gaz031, very well explained.
Heh thanks! I'm not looking forward to typing a 60+ page project in it when at university but hopefully it will become easier with practice.
16. (Original post by Gaz031)
I should stick to mathtype if people want help with questions in the same week that they post them.
The cos[z-(pi/4)] took me a while to produce and for some reason it wouldn't display very well if I included the expression on two lines without leaving a line space.
The (sina)/(cosa)=tana wouldn't work in fraction mode either, which is annoying.
how do you work out the 2nd answer of -0.547????
i can never do them when they are in radians
17. (Original post by ruth_lou)
how do you work out the 2nd answer of -0.547????
i can never do them when they are in radians
You use the fact that cosx is an even function, so:
z-(pi/4)=(+-)1/(3rt2)
18. i still cant get that answer *cries*
19. (Original post by ruth_lou)
i still cant get that answer *cries*
-0.547=-1/(3rt2)+(pi/4)
20. do u get the formula for the trapezium rule?
21. Yet more of my messing around. A trig summary is attached.
I'd appreciate it if anyone can tell me how to write (sina)/(cosa)=tana in latex. The \frac{sina}{cosa} input doesn't seem to work. Indeed, i'm having trouble writing any text in fraction form.
Attached Images
22. trig summary 2.pdf (26.1 KB, 167 views)

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