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# Edexcel IAL Core Mathematics - C12 - WMA01 - JUNE 2016

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1. (Original post by ToxicPhantom007)
hey do u think my answers are correct ? ive mentioned them above
Well I have some of the same answers.1,2,3,4,5,8,9,10,12,13.I don't remember What I wrote for the rest,Didn't do that g(x) transformed graph and will only get method marks for integration(One of the area 'bits' I got was negative and I decided to focus more on the other questions yielding more marks than figuring out why it was negative)
2. (Original post by ToxicPhantom007)
1. p=1.5, q=63
2. a. 14.556, b. 7.278 , 30.556
3. a. x< or equal to 4.5
b. x> 1.5 or x< -5 and 1.5<X<4.5
4.arithmetic series quest a)4 b)400 c)didnot solve
5 the surd question a) k=32 b) 5 sqrt 2 c) n=50
6. log question sim. eq. x=0.5 y=8
7.centre(x-a)^2 + y2= a^2A= 25/8 = 3.125
8. angle sin 19.5 and -30
9. geometric series n= 39
10. graph x coordinates A= 8/5 B=20/9 and in the transformed graph we had to multiply y values with 3/2
11. Q(x)a= -10 b= 13
12. sectorarea = 0.654
13. some angle question pi/12 and 5pi/12
13. integration 0.33 (i know this is not exact as asked in the question)
Pi by 12 is out of range range from pi by 4>theeta plus pi by 4>2pi plus thita

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3. [QUOTE=Saad69;65149023]I got 30 and -19.5 I think

range was from -90 to 90.. 30 is wrong because the negative sign only tells you in which quadrant sin is negative.. so final answer was 19.5 and 330 ( sin is negative in the cos quadrant with respect to the range).. 330 because you subtract 360 and 30 ( which is in the cos quadrant where sin is negative) and 19.5 because sin-1 of ( 1/3) is only positive in the first quadrant
4. [QUOTE=Einsteinj.n.r;65187427]
(Original post by Saad69)
I got 30 and -19.5 I think

range was from -90 to 90.. 30 is wrong because the negative sign only tells you in which quadrant sin is negative.. so final answer was 19.5 and 330 ( sin is negative in the cos quadrant with respect to the range).. 330 because you subtract 360 and 30 ( which is in the cos quadrant where sin is negative) and 19.5 because sin-1 of ( 1/3) is only positive in the first quadrant
i am sorry but you are wrong... the correct answer is -30 and 19.5. 330 lies beyond the given range
5. [QUOTE=Ibrahim Rampuri;65187551]
(Original post by Einsteinj.n.r)

i am sorry but you are wrong... the correct answer is -30 and 19.5. 330 lies beyond the given range
so no marks for me?
(Original post by Ibrahim Rampuri)

so no marks for me?
what did u get?
7. [QUOTE=Ibrahim Rampuri;65188797]
(Original post by Saad69)

what did u get?
30 and -19.5
(Original post by Ibrahim Rampuri)

30 and -19.5
Does anyone remember the question?? Then maybe we can solve it again.
9. [QUOTE=Ibrahim Rampuri;65187551]
(Original post by Einsteinj.n.r)

i am sorry but you are wrong... the correct answer is -30 and 19.5. 330 lies beyond the given range
I cant remember what I wrote exactly but -30 is wrong since the negative sign is supposed to guide you.. so it should have actually been 30 and not -30 ( I confirmed with my classmates as well)
10. [QUOTE=Einsteinj.n.r;65189693]
(Original post by Ibrahim Rampuri)

I cant remember what I wrote exactly but -30 is wrong since the negative sign is supposed to guide you.. so it should have actually been 30 and not -30 ( I confirmed with my classmates as well)
So I am correct 30 and -19.5?

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(Original post by Einsteinj.n.r)

So I am correct 30 and -19.5?

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I'm pretty sure its -30 and 19.5
(Original post by Einsteinj.n.r)

So I am correct 30 and -19.5?

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30 is fine but -19.5 is not ( its supposed to be 19.5 ) cause it was sin-1 of (1/3) which 19.5.. you'll probably score 2/4 marks which is fair enough provided you had shown your steps:-)
13. [QUOTE=Einsteinj.n.r;65191111]
(Original post by Saad69)

30 is fine but -19.5 is not ( its supposed to be 19.5 ) cause it was sin-1 of (1/3) which 19.5.. you'll probably score 2/4 marks which is fair enough provided you had shown your steps:-)
I wrote 30 but I got -30. I did that because when I was going through the paper I remember my teacher telling us that u don't write the sign because it just helps us guide.
14. [QUOTE=Sunethra;65191401]
(Original post by Einsteinj.n.r)
I wrote 30 but I got -30. I did that because when I was going through the paper I remember my teacher telling us that u don't write the sign because it just helps us guide.
Yeah that's why I'm telling these other guys that its 30 and not -30 you're right
15. [QUOTE=wenogk;65190595]
(Original post by Saad69)

I'm pretty sure its -30 and 19.5
yes tbh i had 30 and -19.5 at first and like last 5 mins I changed it to this and it's the correct answer
16. [QUOTE=Sunethra;65191401]
(Original post by Einsteinj.n.r)
I wrote 30 but I got -30. I did that because when I was going through the paper I remember my teacher telling us that u don't write the sign because it just helps us guide.
she only meant that when trying to find out the sin value but that doesnt mean u dont use the negative region; which is supposed to give -30
17. I'm pretty sure the range was -180 to 180 and when the range includes negatives, you go in the clockwise direction as well and you take it angles as negatives
18. (Original post by Najlac)
I'm pretty sure the range was -180 to 180 and when the range includes negatives, you go in the clockwise direction as well and you take it angles as negatives
the range was -90 to 90, but ya what ur saying is right..
19. (Original post by Imran hasan)
what was the answer least value of n
'Twas 39 I think
20. [QUOTE=Einsteinj.n.r;65192321]
(Original post by Sunethra)

Yeah that's why I'm telling these other guys that its 30 and not -30 you're right
I got -30 and 19.5. I do think the sign is important as it indicates whether the angle is clockwise or anti-clockwise. I tried putting -19.5 and 30 into the calculator but they give sin with negative value.

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