OCR C2 exam Wed 25th May

Yes I put 60 degrees and 240 degrees instead of in radians, how many marks will I lose ?

10cm, 5.4 something? for first
two was 3pi/10 and radius 20.4cm
third question was expanding (3+kx)^3 then k in part 2 was +/-1/root3 i believe

four was logs logbase 3 (x^2/x+4)
then x=12 i think
five was integration dont remmeber values
5bii was 4
6 k was 91, n was 38 cant remember part ii
7 was x^2-4x+3 and roots -1 1 and 3
and integrated it between 3 and 1 think answer was 512/15 or something
8 was

No, A is 3/5 as the 5/3AX gives values

i.e Sine(5/3X36) = Sine(60)

So your A is 5/3 for application however the scale factor is 3/5

A=3/5 whcih when applied goes to 5/3
K- root3/2

i think i got something like 38, i'm probably wrong

i said a was 3/5 but i used 3/5 throughout.... Would that lose me loads of marks?

how many marks would you lose if you said it was a stretch parallel to the x axis but got the stretch value wrong?

Did people get +/- 3 for coefficient of k?
Or did i mess up lol

What was the constant question answer with the coefficient of x^2

wasnt it like 9k^2 x^2 = 27x^2
9k^2 = 27
k^2 = 3
k = + or - root 3? idk if this is correct, that's what i put

there was a six mark question but i dont remember what it was does anyone remember?

What did you say a was? 5/3 or 3/5?

What did everyone get for the trapezium rule

Yeah, in positive direction

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