Here are the answers to P2 edexcelWatch
How did you proove 8 i) ?
cos xcos30 - sin xsin 30 = 3cos xcos 30 + 3sin xsin 30
cos 30 = root 3/2, sin 30 = 1/2:
(root 3/2)cos x - (1/2)sin x = (3root 3/2)cos x + (3/2)sin x
-2sin x = (root 3)cos x
Dividing by cos x: -2tan x = root 3, tan x = -(root 3/2).
I did it like this:
Got it into the format of an Rsin(x+a)
Then worked out what X was, and then said tan of that value was -root3 over 2, which is what it was. Surely I won't lose any marks for this?
I remember from my first P2 that the graphs took ages, so I left 4 and 5 out until the end. The only question which was slightly troublesome was the area under the curve/line. I still got that right though, from the answers by mensandan. I had 30mins left when I finished, took 20mins to check them over where I made up about 5 marks for silly errors (like integrating 5 to 5), and noticing the range question had an upper limit of 11. I still had 10mins spare at the end to write all my names on. I had bloody 4 pages of graph paper.
why not use the classic x, -3, -2, -1, 0, 1, 2, 3, method?
worked for me!
I did the Jan 03 paper which everyone found harder than usual, much like the Jun 02 P1 paper and especially the horrifying P3 of Jun 03 being much harder than their predecessors. Oh well, I guess I missed out on some extra marks overall. I only got a 90 on my P2; people sitting this paper could easily get over 95 and possibly 100. Argh. This sucks. The people who got 60-ish on the Jan paper found this paper shockingly easy, and some from this category, mentioned that they might get close to full marks.
Why can't Edexcel set papers that are consistent in difficulty?! Very pissing.
is this wrong
[email protected] = [email protected]
[email protected] = 2([email protected])
1 = 2([email protected])/([email protected])
So 1/2 = [email protected]
When you divided by [email protected] I reckon you forgot that the LHS would be 1 and put 0 like you had swapped sides:
Should only cost a couple of marks. Sorry for the bad news dudes. dan
I'm not being funny, but don't you think you're a bit presumptious saying that you've done great? Loads of you do it and to be honest its not all that nice for those of us who found it very difficult when you're saying it was piss easy. I'm predicted AAB in all my other subjects and will be grateful for an E in maths.
First thanks for putting your answers up it is appreciated by everyone,
but for question: 7c) where you get the area as 97-3ln2. I got 95 - 3ln 2 ( i thiknk!)
BUT I remember getting the 91,the 6 , the 10ln2 and the -13ln2 in the method, so basically if you kinow what i mean i have messed up the very last line and added it up wrong!. Does this mean i wlil lose a lot of marks? Will it only be one mark? please be so!!
Also if i only lost one mark will this become full marks because after P3 i need all the marks i can get!!
In my opinion these exams were a little easier than the ones last year. They were marked up heavily (about 10%). I think these were easier but no walkover so they will either be marked up a little or at worst remain steady. Don't forget many people will have done really badly, like 10% or less, with no intention of carrying on, these people always outnumber those who score 85% plus as such there is rarely a move down, and if there is the most I can remember being told about was 3 marks in a Jan module. So look on the bright side, those silly marks you thought you dropped will be given back to you for free, yay!!!
was just wondering though, for 22a) Range of f
2<=y<=11 " wasnt the bottom value 3? i got 1 for upper value but dont remember getting 2 for bottom value!!
What was f(x) again?