Edexcel C3 June 2016 - Unofficial Mark Scheme

If I put -root5 < x < root 5

Do I get any marks at all??

Im a ****ing spac I dont know why I did that

Does anyone have the paper? If not, can someone tell me, if you remember, whether they gave you the range for the "sketch arcsinx" question? As they gave the domain but I can't remember whether they gave the range

isn't the solution for 5i) 0.1609 also valid?

Will I lose any marks for writing ln(5/2) as 1/2ln(25/4)

For 5i what did people do with the sin and cos?

Also part 2a is wrong, -4x^2-20=-4(x^2+5) so -4/x^2+5

Will I lose any marks for writing ln(5/2) as 1/2ln(25/4)

Past grade boundaries for A and A*:

Jan 2009: 60
Jun 2009: 67
Jan 2010: 59
Jun 2010: 62 (68 A*)
Jan 2011: 61 (68 A*)
Jun 2011: 65 (70 A*)
Jan 2012: 65 (70 A*)
Jun 2012: 64 (69 A*)
Jan 2013: 62 (68 A*)
Jun 2013: 50 (57 A*) (01), 61 (67 A*) (01R)
Jun 2014: 60 (66 A*) (01), 60 (67 A*) (01R)
Jun 2015: 59 (65 A*)

Average: 61.1 (66.8 A*)

Today's paper was definitely not as difficult as June 2013. The polls show that people thought last year's paper was slightly more difficult.

I'd guess similar boundaries to June 2014; A – 60, A* – 67.

Will I lose any marks for writing ln(5/2) as 1/2ln(25/4)

does anyone have the workings to question 8 a, where you had to prove an identity equalled cotx?

No you shouldnt drop any marks for that since they are the same value

LHS:
2/tan2A +tanA
2(1-tan^A)/2tanA +tanA
(1-tan^2A+tan^2A)/tanA
1/tanA

I think we would've included the 4, don't worry ahaha. I couldn't fully remember the question - I think it was tan4x but the 3/4 is all I needed to know. thank god

I can't remember but if anyone else can, did it ask to state in simplest form or something, if I didn't then what u got is right (I put same as you)

does anyone have the workings to question 8 a, where you had to prove an identity equalled cotx?