Mr M's OCR (not OCR MEI) Core 2 Answers May 2017Watch

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#1
Mr M's OCR (not OCR MEI) Core 2 Answers May 2017

1. (i) 4 (4 marks)

(ii) (2 marks)

2. (i) 0.715 (4 marks)

(ii) Underestimate because trapeziums lie under the curve (2 marks)

3. (i) (4 marks)

(ii) 11 (2 marks)

4. (6 marks)

5. 2.19 (6 marks)

6. (7 marks)

7. a) 314 (4 marks)

b) i) Show (4 marks)

ii) x=2 and y=7 or x=3 and y=17 (4 marks)

8. a) (5 marks)

b) (6 marks)

9. (i) Show and (4 marks)

ii) a) Show (4 marks)

b) and and and (4 marks)

Heck. 9 was wrong. Now fixed.
9
2 years ago
#2
I do believe that there should be 4 answers to the final question, because it was actually sin(2*theta) rather than sin(theta)

**EDIT** - This has now been fixed
4
2 years ago
#3
What was question 5? (Not the answer. The question)
0
2 years ago
#4
(Original post by temmerson)
I do believe that there should be 4 answers to the final question, because it was actually sin(2*theta) rather than sin(theta)
You are incorrect, it was 100% 0.5sin(√theta) not sin(2*theta)
1
2 years ago
#5
The answer to the last Q is wrong there is 4 solutions
2
2 years ago
#6
(Original post by Saaam1234)
What was question 5? (Not the answer. The question)
Rhombus question?
0
2 years ago
#7
Are there not 4 solutions for last part of last question? As 2x divides by two so answers also fit in range 0<x< 2pi to get 390 degrees and 520 degrees which when divided by 2 also fit in range (change to radians)...
1
#8
(Original post by Saaam1234)
What was question 5? (Not the answer. The question)
Sector AOB arc length 6 cm and sector area 24 cm^2. Find area of shaded segment to 3 sf.
0
2 years ago
#9
I did the trapezium rule equation is degrees so I got the wrong answer.
Also I got x=-2 and x=-3 for 7bii) still got the right y co-ordinates.

How many marks would I lose for these mistakes thanks!
0
2 years ago
#10
Mr M these solutions are missing 13/12 pi and 17/12 pi
0
2 years ago
#11
What was 3(i) and (ii)?
0
2 years ago
#12
Dear Mr. M, are you sure there's only 2 answers for the final part?
1
#13
(Original post by temmerson)
I do believe that there should be 4 answers to the final question, because it was actually sin(2*theta) rather than sin(theta)
Sorry. Now fixed.
0
2 years ago
#14
I got x=3 on q1 because I -4 instead of adding it...how many marks would I lose for both part one and two?
0
2 years ago
#15
Dear Mr. M, how many marks would I lose for getting the four correct answers at the end but eliminating two of them so I only gave two angles for my final answer?
0
#16
(Original post by AaronC88)
I did the trapezium rule equation is degrees so I got the wrong answer.
Also I got x=-2 and x=-3 for 7bii) still got the right y co-ordinates.

How many marks would I lose for these mistakes thanks!
Lose one for degrees.

Lose one for failing to solve quadratic properly.
0
#17
(Original post by Hazzer65)
Rhombus question?
Eh?
3
2 years ago
#18
what was the question 6i, 7bii and 8b??
0
2 years ago
#19
I only put the first 2 solutions for q9, how many marks lost???
0
#20
(Original post by phat-chewbacca)
What was 3(i) and (ii)?
First 4 terms of

Coeff of of
0
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