OCR Maths C3 June 2019 (Old Spec resit only) Unofficial Markscheme

how did u find it

Does anyone remember the question where you had to find values for sin^2(A) and sin^2(B). Or their answers?

0.55 and 0.2 ?

Cheers. Do you remember how many marks it was?

Oh damn I didn’t realise for last part area of RA was part of the question, how many marks do you reckon that was ?

From what I can remember this is what i got (numbers may be slightly off and so might the question order)
1. Second derivative - 2/7

2. Modulus
(i) 2/3, and something else
(ii) With Trig sec1/2y - 3.54

3. Area of PQ = e-3

4. Functions equations:
(i) f(x) a= 4 b=-7
(ii) ggg(x) p= -1/5 q=20

5. Rate of change? Something like 6.81/y x 0.16 = 0.51

6. Gradient at A? and iterations? Cant remember

7. 2+3Cos -1 (x) ?
(i) Translation 2 in x, stretch 3 in y
(ii) Range: 2<y<3pi +2

8. Trig : A= 1/5 B=11/20

9. Find A and area of RA= 3.5, Area = 6root5

I got the same for the 11 mark question!

Anyone for a C4 exchange ?

Heres how I have c4, cant remember much:
1. Partial fraction cant remember
2. Vector : (006) parallel to z
3. cant remember
4. Show integral is ln4
5. Binomial expansion : 1 +5x -50x^2 +750x^3. mod x< 1/25 543/500
6. Integration: something complicated like u^-6 and u^8 with some constants infront
7. curve defined implicity, y=-1/2 and therefore x and y have no solutions since 1/0
8. Parametic stat points were 0,-1 and -4,3 i think
9. ln(a/5-a) = e^kt - ln24 i think. and final part i got 1.34

I got 1.34....... it was a long decimal