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AQA A2 Mathematics MPC4 Core 4 - 9th June 2015 [Discussion & unofficial markscheme]

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Reply 1360
Avatar for Tiwa
Tiwa
7
God bless everyone. All the best!
good luck, can't be worse than c3!
Reply 1362
Avatar for CD223
CD223
OP
10
Original post by amyrah
good luck, can't be worse than c3!


Don't jinx it lol :wink:


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Good luck ya'll!
Any last minute tips for forming differential equations? :frown:
Original post by CD223
Yes that's correct. But if they're perpendicular the direction of the vectors doesn't matter :smile:


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Oh ok thanks! For differentiak equatiobs could they ask us to form one which is inversely proportional? :/
Reply 1365
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CD223
OP
10
Original post by HennersPD
Oh ok thanks! For differentiak equatiobs could they ask us to form one which is inversely proportional? :/


Possibly'


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What equations do we need to know? Is it just double angle identities and the ones from core 3?
Original post by Starcrossed123
What equations do we need to know? Is it just double angle identities and the ones from core 3?


And triple angle?
Original post by saad97
And triple angle?


What triple angle? What are they?
Original post by hamza3256
Do we need to memorise the equation for sin3x, cos3x, and tan3x?


Whaaaat? What are the equations for these? someone write them here please?
Original post by matthew6665
Whaaaat? What are the equations for these? someone write them here please?


Triple angles:
Sin3x = 3sinx - 4sin³x
Cos3x = 4cos³x - 3cosx
Tan3x = 3tanx - tan³x / 1 - 3tan²x
Just use 2x and x for triple angle thdn use double angle for the 2x


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HYPE!
How was it?

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Original post by ubisoft


It went alright. didn't like question 7
what was the coordinates of C?
Omg I made a stupid mistake, the question where you had to show that h(x) was decreasing, I accidentally did some weird stuff by finding the second derivative :frown: how many marks would I have lost? I did find an equation for the first derivative though
I got -9 -2 18, pretty sure I'm wrong tho because I screwed up d
How was it?


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Original post by macai
I got -9 -2 18, pretty sure I'm wrong tho because I screwed up d


I got the same


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