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OCR C3 (not MEI) Official Thread - Tuesday 21st June 2016

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Reply 140

Ligand

People are saying they got pi/6 for 9ii but I got 0.6.. something. Anyone else?

Reply 141

Jmedi

my thoughts are that it is fair paper I just unfortunately messed up q6 so probably dropped about 5 on that and on q9 the final part I got something different from 32sin(theta) somehow and previous part I dropped a mark or so.

Hopefully core four goes better!

Reply 142

Vstudent13

Hi was x for the last part of 6 not negative?

Reply 143

AlfieH

Original post by daniellon

1 y=12x=15

2 4x-4Inx-1/x

3 1/13 and 3/4

4 (i) Show that
(ii) 5/2

5 a=6 b=5

6(i) Sketch
(ii) 0.242
(iii) x= 0.242 and y=-0.133

7(i) any real values of g(x) and f(x) is greater and equal to 3
(ii) f is not a one to one function inverse function of g(x) is x+4a/5
(iii) x= 3a/2 and -5a/2

8(i) Show that
(ii) 4+2root 2
(iii) only pie/6
(iv) 32 sin

Any guess for the grade boundaries for an A*?

What about the equations of the reflected curves? I got 1.33 for some reason for y coordinate?

A* will be 63-64+

Reply 144

Abcde99

Ugh I didn't do so well, now I'm praying for the grade boundary to be low and do better in C4 to get an A*

Reply 145

Mathematicus65

Original post by Ligand

People are saying they got pi/6 for 9ii but I got 0.6.. something. Anyone else?

Actually yeah I think that's what I got. How many marks was that question?

Reply 146

daniellon

Original post by Ligand

People are saying they got pi/6 for 9ii but I got 0.6.. something. Anyone else?

I think they are exactly the same

Reply 147

czj1997

for tan(A-B) how do you get 1/13 and 3/4?

Reply 148

Mrrexxxx

I didn't get pi/6 or whatever. Pretty sure it was just 4 + 2root 2

Reply 149

Jmedi

Original post by Ligand

People are saying they got pi/6 for 9ii but I got 0.6.. something. Anyone else?

Yeah I remember getting 0.6 something too.
If the question asked for an exact value that's so silly of me x(

Reply 150

drandy76

Original post by Mathematicus65

Actually yeah I think that's what I got. How many marks was that question?

3, ended up being cos2theta =0.25

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Reply 151

Mrrexxxx

I got that pretty sure

Original post by AlfieH

What about the equations of the reflected curves? I got 1.33 for some reason for y coordinate?

A* will be 63-64+

Reply 152

Jmedi

Original post by Mrrexxxx

I didn't get pi/6 or whatever. Pretty sure it was just 4 + 2root 2

That was the previous part

Reply 153

MrZebraCookie

What did people get for Tan A and Tan B? I managed to get Tan A as 4 and -3 and Tan B as 27 which I'm guessing is wrong

Reply 154

AlfieH

Original post by Keebsclark

Can anyone help me with what i can do about this? I sat my C3 exam this morning and was given a seat that was much higher than my table(sounds stupid so far, i know) but as someone who has suffered from light occasional back pain for a few years, this caused s much discomfort that i was in serious pain throughout the entire exam (and that was with painkillers) does anyone know if there is anything i can do about this?

Too late now. If you wanted to you could've asked an invigilator to stop and you could've spoken to them about having a break, new chair, etc.

You didn't say anything though so it's too late now I think.

Reply 155

AlfieH

Original post by MrZebraCookie

What did people get for Tan A and Tan B? I managed to get Tan A as 4 and -3 and Tan B as 27 which I'm guessing is wrong

Tan^3B was 27 so TanB was 3.

Reply 156

daniellon

Original post by AlfieH

What about the equations of the reflected curves? I got 1.33 for some reason for y coordinate?

A* will be 63-64+

because of the reflection in y axis and x axis

Originally, the x and y coordinates are both positive. After the transformation, they will become negative