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# Edexcel Core 3 - 21st June 2016 AM watch

1. (Original post by Yua)
was 4 solutions
Yeah I got that! Thought it was wrong but went with it anyway, glad I did lol. Also the proof was fab
2. (Original post by Lavender26)
Anyone know how many marks were for questions
Last part of 5 (the cosec q thing)
The proof of cotx thing
The last part of the last question?
Thanks (I know I lost all these marks for sure)
5b was a 5 marker I think. 9b I'm told was 4 marks but I got 1 at most on that
3. (Original post by rxns_00)
66 maybe 65 it was sorta average
Ok thank you! I don't think I'm too far off!
4. Guys which equation did you substitute in the values to get the sign change to prove x=1.473?
5. (Original post by Yua)
you dont use the graph
3g(x+1) +pi = 0
3arcsin(x + 1) = -pi
arsin(x+1) = -pi/3
x+1 = (sin-pi/3)
x= -1 + sin(-pi/3) and simplify
yesss omg i love you
6. (Original post by suibster)
x=3 y=16

-1/2(x-3)=y-16

-1/2x + 3/2 = y-16

-x +3 = 2y-32

-x -2y + 35 = 0

x+2y-35=0
Damm it this question cost me marks, no idea how i did but i got gradient as 10 (think i did 6+4) instead of (6-4) ff,so got the normal as -1/10 but i got y=16 and the method correct, any idea how many marks id lose?
7. No easy questions.. Where is the mod graph sketching, where is the domain and range....

8. for part 9C
9. (Original post by jwifiuhrkoa)
Q4a was not ln2.5 the answer is 0.5ln (25/4)
theyre the same thing g
10. For question 5 part one I wrote the answer as x=9.2175 which is 1/4tan(3/4) in degrees rather than radians because I wasn't concentrating -how many marks do you think I will lose for that. As for the grade boundaries, C3 is an easy module but relative to the average C3 paper that was considerably more challenging so I would say 100 UMS will be 71/75 with 65 an A*.
11. Thought it was a good paper imo, reckon it will be 66-68 for a*
12. (Original post by cainy393)
The last solution to 8b was (assuming you have the others correct) -1.277 + pi
for the last question pat c i got
-5ln(1/2 + 0.5/e)
so a =5 and b=0.5
13. can anyone remember the functions G and F for Question 1 and also the question from 1(a)? I know I've got 1(b) correct but I'm not sure if I got 1(a) correct (if i remember I got roots).
14. (Original post by Pablo Picasso)

100UMS - 75
90UMS - 71
80UMS - 66
Yeah no pal it's 2016 not 2006

(But I get it, you wanna show how easy you found it. Good for u tho)
15. (Original post by Yua)
might write a MS from memory, if anyone remembers any questions let me know
I remember them check your messages
16. Why equation did you use for the change of sign equation and what roughly were your answers starting to think I got it wrong even though I did get a change in sign
17. (Original post by Slimewizard)
even if it does it's unlikely to be anything more than a two-marker so i think you're okay
well, it came up Looooool but you were right i drew arcos by accident instead of arccsin but i think i got the 2nd part right
18. (Original post by mpwb12345)
Will send u it
Can you send it to me as well please
19. How do you do question 6?

Something like this:

x^4 + x^3 - 3x^2 + 7x -6/x^2 + x -6 = x^2 +A + B/(x-2)
20. (Original post by timelizard)
Yeah no pal it's 2016 not 2006

(But I get it, you wanna show how easy you find out. Good for u tho)
looool love you

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