I'm not 100% sure on all of these, but I think most are correct.
kprime2's model answers: http://www.thestudentroom.co.uk/atta...6&d=1466601487
Question 1Spoiler:Question 2ShowA. 5, 6
B. 6Spoiler:Question 3ShowA. (204x^2)/(x^2+5)^2
B. >sqrt(5), <sqrt(5)Spoiler:Question 4ShowA. R= sqrt(5)
a= 26.57°
B. 33.0°, 273.9°
C. 86.1°Spoiler:Question 5ShowAi. 21
ii. ln(2.5)
iii. 25
B. Show that question
C. 1.4368, 1.4373
D. Show the root was in [1.4365, 1.4375]Spoiler:Question 6Showi. 0.9463
ii. 0.5cosec(4Y)Spoiler:Question 7ShowA. A=3, B=4
B. Normal eqn. 0.5x + 17.5Spoiler:Question 8ShowA. graph of arcsin, sort of a rotated S shape. Went through (0,0), (1,pi/2), (1,pi/2)
B. 10.5sqrt(3)Spoiler:Question 9ShowA. Trig proof
B. 2.848, 1.277, 0.294, 1.865Spoiler:PDF with full worked solutions : http://www.thestudentroom.co.uk/atta...7&d=1466526735ShowA. 6.740  dose after 4 hours
B. show that dose equalled a value after 7 hours
C. 5ln(2 + 2e^1)
A = 5, B = 2
3c:
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Edexcel C3 June 2016  Unofficial Mark Scheme
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 1
 21062016 11:07
Last edited by veldt127; 22062016 at 14:45.Post rating:55 
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 2
 21062016 11:10
For 5i what did people do with the sin and cos?
Last edited by Dieselblue; 21062016 at 16:35.Post rating:2 
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 3
 21062016 11:10
if you don't mind would you be able to do your working out if at all possible? 🙈
Post rating:1 
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 4
 21062016 11:11
i agree however i dont know about 7 part b, i cant really remember the question but i believe i left it in terms of sin but your answer looks more complete
Post rating:1 
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 5
 21062016 11:12
What was question 6 again please?

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 6
 21062016 11:13
(Original post by veldt127)
I'm not 100% sure on all of these, but I think most are correct.
1.
A 5, 6
B 6
2.
A (204x^2)/(x^2+5)^2 Might not be simplest form
B >sqrt(5), <sqrt(5)
3.
A R= sqrt(5)
a= 26.57°
B 33.0°, 273.9°
C 86.1°
4.
Ai 21
ii ln(2.5)
iii 25
B Show that question
C 1.4368, 1.4373
D Show the root was in [1.4365, 1.4375]
5.
i 0.9463
ii 0.5cosec(4Y)
6.
A A=3, B=4
B Normal eqn. 0.5x + 17.5
7.
A graph of arcsin, sort of a rotated S shape. Went through (0,0), (1,pi/2), (1,pi/2)
B 10.5sqrt(3)
8.
A Trig proof
B 2.848, 1.277, 0.294, 1.865
9.
A 6.740  dose after 4 hours
B show that dose equalled a value after 7 hours
C 5ln(2 + 2e^1)
A = 5, B = 2
Sorry about the formatting, I'll try to improve it once I'm home.Post rating:9 
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 7
 21062016 11:14
(Original post by particlestudent)
Im sure only the middle two values were allowed for 8BPost rating:4 
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 8
 21062016 11:15
(Original post by veldt127)
I'm not 100% sure on all of these, but I think most are correct.
1.
A 5, 6
B 6
2.
A (204x^2)/(x^2+5)^2 Might not be simplest form
B >sqrt(5), <sqrt(5)
3.
A R= sqrt(5)
a= 26.57°
B 33.0°, 273.9°
C 86.1°
4.
Ai 21
ii ln(2.5)
iii 25
B Show that question
C 1.4368, 1.4373
D Show the root was in [1.4365, 1.4375]
5.
i 0.9463
ii 0.5cosec(4Y)
6.
A A=3, B=4
B Normal eqn. 0.5x + 17.5
7.
A graph of arcsin, sort of a rotated S shape. Went through (0,0), (1,pi/2), (1,pi/2)
B 10.5sqrt(3)
8.
A Trig proof
B 2.848, 1.277, 0.294, 1.865
9.
A 6.740  dose after 4 hours
B show that dose equalled a value after 7 hours
C 5ln(2 + 2e^1)
A = 5, B = 2
Sorry about the formatting, I'll try to improve it once I'm home. 
 Follow
 9
 21062016 11:16
(Original post by veldt127)
I'm not 100% sure on all of these, but I think most are correct.
1.
A 5, 6
B 6
2.
A (204x^2)/(x^2+5)^2 Might not be simplest form
B >sqrt(5), <sqrt(5)
3.
A R= sqrt(5)
a= 26.57°
B 33.0°, 273.9°
C 86.1°
4.
Ai 21
ii ln(2.5)
iii 25
B Show that question
C 1.4368, 1.4373
D Show the root was in [1.4365, 1.4375]
5.
i 0.9463
ii 0.5cosec(4Y)
6.
A A=3, B=4
B Normal eqn. 0.5x + 17.5
7.
A graph of arcsin, sort of a rotated S shape. Went through (0,0), (1,pi/2), (1,pi/2)
B 10.5sqrt(3)
8.
A Trig proof
B 2.848, 1.277, 0.294, 1.865
9.
A 6.740  dose after 4 hours
B show that dose equalled a value after 7 hours
C 5ln(2 + 2e^1)
A = 5, B = 2
Sorry about the formatting, I'll try to improve it once I'm home.
Does anyone know if it specified what form it wanted the normal to f(x) in? 
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 10
 21062016 11:17
(Original post by mpwb12345)
if you don't mind would you be able to do your working out if at all possible? 🙈
(Original post by Gouber)
What was question 6 again please? 
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 11
 21062016 11:17
(Original post by Dieselblue)
For 5i what did people do with the sin and cos?
Also part 2a is wrong, 4x^220=4(x^2+5) so 4/x^2+5Post rating:10 
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 12
 21062016 11:17
(Original post by Dieselblue)
For 5i what did people do with the sin and cos?
Also part 2a is wrong, 4x^220=4(x^2+5) so 4/x^2+5
Edit: your answer gives a non real rootLast edited by veldt127; 21062016 at 11:19.Post rating:2 
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 13
 21062016 11:18
(Original post by particlestudent)
Im sure only the middle two values were allowed for 8B 
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 14
 21062016 11:18
(Original post by veldt127)
I'm not 100% sure on all of these, but I think most are correct.
1.
A 5, 6
B 6
2.
A (204x^2)/(x^2+5)^2 Might not be simplest form
B >sqrt(5), <sqrt(5)
3.
A R= sqrt(5)
a= 26.57°
B 33.0°, 273.9°
C 86.1°
4.
Ai 21
ii ln(2.5)
iii 25
B Show that question
C 1.4368, 1.4373
D Show the root was in [1.4365, 1.4375]
5.
i 0.9463
ii 0.5cosec(4Y)
6.
A A=3, B=4
B Normal eqn. 0.5x + 17.5
7.
A graph of arcsin, sort of a rotated S shape. Went through (0,0), (1,pi/2), (1,pi/2)
B 10.5sqrt(3)
8.
A Trig proof
B 2.848, 1.277, 0.294, 1.865
9.
A 6.740  dose after 4 hours
B show that dose equalled a value after 7 hours
C 5ln(2 + 2e^1)
A = 5, B = 2
Sorry about the formatting, I'll try to improve it once I'm home.
Can anyone remind me what the questions were for 5i) and 6a) 
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 15
 21062016 11:18
(Original post by veldt127)
I got 204x, I thought it might be like that but couldn't find where I'd gone wrong. You might be right on that one 
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 16
 21062016 11:19
(Original post by Mattematics)
Agree with all except for 3c which I know I got wrong.
Does anyone know if it specified what form it wanted the normal to f(x) in? 
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 17
 21062016 11:19
(Original post by Mattematics)
Agree with all except for 3c which I know I got wrong.
Does anyone know if it specified what form it wanted the normal to f(x) in? 
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 18
 21062016 11:20
(Original post by veldt127)
It didn't specify
Think I got 73/75.Post rating:2 
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 19
 21062016 11:20
(Original post by DomWoodcock)
Yeah I think I remember the limits between pi/2 and pi/2Post rating:7 
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 20
 21062016 11:21
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Updated: September 7, 2016
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