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CCEA A2 maths - C3 20th may 2016

havent seen a thread for C3 so thought i would start one!!
predicting a hard or decent paper?

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Reply 1
Reply 2
that was so fking hard
can confirm this paper was quite hard, especially Q8. I've done 15+ papers and never seen anything like that...
Reply 4
when differentiating cosec^2/tan3x did you change tan3x into tanx or just use the 3x?
Reply 5
and did your newton rhapson method work? mine didnt
Original post by harrytqo
and did your newton rhapson method work? mine didnt


nope
Well that was an absolute disaster, especially the half life question
If you don't do physics you weren't for getting the half life question!


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Original post by Rmcmurray21
If you don't do physics you weren't for getting the half life question!

exactly this, no way i would have thought of a method to complete it without doing a whole other subject, ccea get your finger out
Like the only way I got it cause I knew the formal haha let's hope C4 is easier


Posted from TSR Mobile
Original post by harrytqo
when differentiating cosec^2/tan3x did you change tan3x into tanx or just use the 3x?


I just used tan3x
Original post by harrytqo
and did your newton rhapson method work? mine didnt


I got 0.230 I think???
Reply 13
Fooking half life question. Did n over 2 = (0.04)^X x n instead of 0.96 :frown:. How many marks do you reckon i can claw back
Reply 14
What did you guys get for the half life question? And for the area under the curve?
(edited 7 years ago)
Reply 15
Anyone reckon grade boundaries wiol be lower than normal?
Original post by K1998r
What did you guys get for the half life question? And for the area under the curve?


I got 1700 years and 8 for the area
same^ ln0.5/-0.0004 = 1730 years
how were you meant to prove always negstive for 7 part i and ii??
Original post by harrytqo
how were you meant to prove always negstive for 7 part i and ii??


Was it not proving it was always positive? I completed the square

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