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# Edexcel A2 C4 Mathematics June 2015 - Official Thread watch

1. (Original post by studentwiz)
still struggling i get cosecx all the way simplfied
What did you get for the boundaries when adjusted for pheta? The lower boundary isn't an exact value, is it?

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2. (Original post by stresso)
What did you get for the boundaries when adjusted for pheta? The lower boundary isn't an exact value, is it?

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i got 1.23 something :/
3. Thanks, I hope you are correct
4. (Original post by anonwinner)
Thanks, I hope you are correct
I hope so too, for the sake of my students
5. Thank you My 4 root 3 Pi is negative.
(Original post by Gilo98)
maybe a sign slip? below is my workings with a positive answer.

Attachment 427427
6. (Original post by kaya_lioness)
Thank you My 4 root 3 Pi is negative.
No worries
7. Me too, how are you going about revision? I'm finding it tough to balance

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8. I've been hearing alot about IYGB papers on TSR lately..what are they? are they like the gold papers? are they custom questions or are they taken from previous exams? or are they like solomons?

does anyone know where I can get them?
thanks

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10. Hi Could someone please explain 4 B 2013 June R? ( paper attached)

https://a086a5a2f39bda93734c56a63fab...%20Edexcel.pdf

Thanks
11. (Original post by kaya_lioness)
Hi Could someone please explain 4 B 2013 June R? ( paper attached)

https://a086a5a2f39bda93734c56a63fab...%20Edexcel.pdf

Thanks
8-9x = 7100. Solve for x and sub this value into your expansion.
12. (Original post by Gilo98)
8-3x = 7100. Solve for x and sub this value into your expansion.
Danke.I tried that But in the mark scheme they use the value of x=0.1 and placed that into the expansion.
13. (Original post by raypalmer)

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To be honest the hardest C4 paper I know of is probably last year's which wasn't exactly mind-blowing
You could go on TeeEm's IYGB thread; the papers are certainly more suitable than Solomon and they are hard
14. (Original post by raypalmer)

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http://www.thestudentroom.co.uk/show....php?t=3361905
15. (Original post by kaya_lioness)
Danke.I tried that But in the mark scheme they use the value of x=0.1 and placed that into the expansion.
waaaat? why would they do that? Btw just realised i misread - 8-9x not 3x

i shall investigate
16. (Original post by Bustamove)
I've been hearing alot about IYGB papers on TSR lately..what are they? are they like the gold papers? are they custom questions or are they taken from previous exams? or are they like solomons?

does anyone know where I can get them?
thanks
http://www.thestudentroom.co.uk/show....php?t=3361905
17. (Original post by kaya_lioness)
Danke.I tried that But in the mark scheme they use the value of x=0.1 and placed that into the expansion.
|x| < 8/9 so don't do 8 - 9x = 7100
Instead see if there's a nice clean cube factor you can take out and then multiply by at the end
18. Thank you
19. (Original post by Bustamove)
Thank you
no worries

20. Cheers pal

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