Mr M's OCR (not OCR MEI) Core 2 Answers May 2012 <strong><font

No. You were supposed to demonstrate understanding of Pythagoras' Theorem (in traditional or trigonometric form) and the definitions of sin, cos and tan as well as appreciating the difference between exact and approximate values.

for this question i dint draw a triangle, i used the fact that sinA/cosA = tanA and then squared bothe sides to get and equation in cos, i got the right andwers but my methd was clearly over complicated, would i still get the method mark?

yes that's fine

You didn't show an understanding of sohcahtoa, basically.

Ohh ok. Do you think I'd get a(ny) mark(s) for getting the decimal answer?

Maybe check with your examination officer, although the acripts will have been sent by now so there may never be anyway to know for sure, unless you orde yor original script on results day

The questions are on a seperate booklet, not the answer booklet, I don't know if they send the question booklets back to the examining board or not. :/

Very good point, if not, be sure to check, some people at my school said minus as well...

I am almost certain that on question 1 it asked for "(3+2x)^5 - (3-2x)^5" since I remember making the point of taking the negative value of each my "(3-2x)^5", and therefore got 1620x+1440x^3+64x^5. Also, when I went back to check my answers towards the end I would like to think I would have noticed that type of mistake, since it was something I preparing for during my revision (since it was a common mistake I used to make).

Just out of curiosity though, would there be any marks given for misreading the question (if it was in fact misread)? Just that I recall reading somewhere that if it was a genuine misreading, and didn't affect the difficulty (which I don't think it did) some marks would still be given.

Thank you very much :-)

Very good point, if not, be sure to check, some people at my school said minus as well...

I have the question paper beside me and it is definitely + on my copy!

Mine too, but he should check just for peace of mind

6)(ii) Sketch graph showing trapeziums under the curve (2 marks)

Mr M for this question, I drew the curve on both quadrants of the positive x axis and said how the integral will only give the area below the curve and the x axis so, the other area is not accounted for. How many marks will I get for the answer I have given.

For question, 9)b)i) I got an answer of 0<y<2, could you please tell me how you got a 1/2 and how many marks I would get for this question. Thanks.

In mark schemes, the +c is usually worth one mark and considering you only got an incorrect answer for that mark, you will only lose 1 mark. Bare in mind, this is what I think.

This was posted from The Student Room's Android App on my A500