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Edexcel A2 C3 Mathematics 12th June 2015

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Original post by Gilo98
Last minute advice/predictions?


I never predict ...
I hope the paper is reasonably hard, because my students do generally better on harder papers ...
(and I hope everybody else does bad too, to help my students even more :colone:)
Original post by ThePrestigeUK
When its Rcos(x-alpha)

Do we work out alpha the same as Rcos(x+alpha)

I swear in the morning I thought we flip for minus, but now just done an example lost 6 accuracy marks FFS

pls someone help me out


use this cos(A + B) = cosAcosB - sinAsinB
cos(A - B) = cosAcosB + sinAsinB
Original post by humayra.ac
no because it is less than 360 not equal to, (the line under the less sign)


jazaak sis :smile:, i missed that sadly.....
Original post by frozo123
yes I can
what do you mean flip? reflection in the asymptote?


apologies if it's unclear
cotx.jpg
how the **** do i reflect in the line y=x this is the hardest thing in c3 for me atm lol
So excited for c3. I'm ready to mash up de boompa
Anyone else use a graphical calc to check answers? Gives such peace of mind!
Original post by TeeEm
I never predict ...
I hope the paper is reasonably hard, because my students do generally better on harder papers ...
(and I hope everybody else does bad too, to help my students even more :colone:)


thought you'd say that :wink: Me too, praying for a bastard of a paper. June 2013 wasn't really that hard for me and 100ums was so low...
Original post by BBeyond
how the **** do i reflect in the line y=x this is the hardest thing in c3 for me atm lol


omfg i feel your pain. no joke the most difficult thing in c3 for me - can never 'visualise' what it would look like
When would you use flip dy/dx into 1/(dx/dy) I can't seem to see when its wanted in past questions
Original post by BBeyond
how the **** do i reflect in the line y=x this is the hardest thing in c3 for me atm lol


I might sneak in a mirror
Reply 1830
Avatar for Viggi
Viggi
1
guys just wondering (and panicking!) how much integration do we need to know for this (C3) because Exam solutions doesn't have a section on integration... :s-smilie:
Original post by Gilo98
thought you'd say that :wink: Me too, praying for a bastard of a paper. June 2013 wasn't really that hard for me and 100ums was so low...


omfg i feel your pain. no joke the most difficult thing in c3 for me - can never 'visualise' what it would look like


****ing tell me about it, i'm lit hopeless at it there must be some easy way of doing it i can't visualise ****, especially when im trying to do the arcsin/tan/cos graphs i havent got a clue
Which paper do you guys find the hardest?
Can anyone explain how bii and c are done? Mark scheme isnt helping muchIMG_20150611_211400.jpg
Original post by Mrkingpenguin
When would you use flip dy/dx into 1/(dx/dy) I can't seem to see when its wanted in past questions


If you have dx/dy you do 1/dx/dy to get dy/dx
Original post by BBeyond
how the **** do i reflect in the line y=x this is the hardest thing in c3 for me atm lol


Hard isnt it...same for me.

We should be allowed mirrors :colone:

But one way to do it is reflect all the crossing points , like (0,-3) into (-3,0)
Original post by Viggi
guys just wondering (and panicking!) how much integration do we need to know for this (C3) because Exam solutions doesn't have a section on integration... :s-smilie:


NONE! there is no integration in C3
Original post by Viggi
guys just wondering (and panicking!) how much integration do we need to know for this (C3) because Exam solutions doesn't have a section on integration... :s-smilie:


integration is in c4
Original post by Viggi
guys just wondering (and panicking!) how much integration do we need to know for this (C3) because Exam solutions doesn't have a section on integration... :s-smilie:


None. :colonhash:

There's no integration on the C3 spec...
Reply 1839
Avatar for Viggi
Viggi
1
Original post by Maham88
integration is in c4


yay thank you!

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