C2 Official thread

[chathumus]

guys, i need help in jan12 9 i ......... plz qiuckly

For part a) let 3x-15 be A
Sin A = 1/2
so A = sin inverese 1/2
A = 30degerees

you know in the quadrants that a silver toy cars thing indicates that sin is positive in the top right and top left. Draw and angle there and the values for sin is 30 degereed 180-30 and thats all since the scale only specifies that much

 

[chathumus]

wait my bad... you have to fix the scale. damn i never got how to fix it...

 

[chathumus]

guys, i need help in jan12 9 i ......... plz qiuckly

for part b) this might help
http://examsolutions.net/a-level-ma...worked-solution.php?paper_id=111&solution=9.2

 

[obaadah]

for part b) this might help
http://examsolutions.net/a-level-ma...worked-solution.php?paper_id=111&solution=9.2

thank u soooooooooooooooooooooooooooooooo much

 

[Ayesha B]

So apparently the paper was leaked, and now edexcel has sent the centers a completely different paper. Wonder if the original one would have been nicer :/ why do people do this.

 

[Hadi Murtaza]

Somebody help, may 2011 Q.5 b) I've left this one out... and can't seem to figure it out

Somebody help, may 2011 Q.5 b) I've left this one out... and can't seem to figure it out

Radius of sector = Distance of O from A = 6 cm
Radius of circle = r
Distance of O from perpendicular of C from O = 6 − r
Distance of C from nearest point of sector = r
Perpendicular bisctor = (π/3)/2 = π/6
Using trigonometry
sin(π/6) = r/(6 − r)
1/2 = r/(6 − r)
2r = 6 − r
2r + r = 6
3r = 6
[ r = 2 cm ]

Hopet his helps

 

[Hamzeh S]

Heading to my exam good luck everyone tell me how u do in this thread after the exam

 

[Hadi Murtaza]

Hey guyz, how wuz u'r exam ??

 

[Hamzeh S]

Hey guyz, how wuz u'r exam ??

great except some algebra mistakes i made u?

 

[Hadi Murtaza]

great except some algebra mistakes i made u?

Awsum, just Awsum Alhamdulliah, xpecting 90+ InshaAllah Wat r u'r xpectationz ??

 

[Ayesha B]

UGHHH. Anyone else ever been in the position where your pastpapers go GREAT and you think you'll ace the exam, and then make the STUPIDEST mistakes on the day?

 

[Hamzeh S]

UGHHH. Anyone else ever been in the position where your pastpapers go GREAT and you think you'll ace the exam, and then make the STUPIDEST mistakes on the day?

that what i did in garden question i used 2pi-0.64 instead of pi idk what got into me and stupid algebra mistakes i hate my life

 

[Hadi Murtaza]

UGHHH. Anyone else ever been in the position where your pastpapers go GREAT and you think you'll ace the exam, and then make the STUPIDEST mistakes on the day?

Aww man, dat happened wid me in M1 but C2 went awsum MashAllah

 

[Ayesha B]

that what i did in garden question i used 2pi-0.64 instead of pi idk what got into me and stupid algebra mistakes i hate my life

I GOT THE FRIKKIN TRAPEZIUM RULE WRONG! and guess what the worst part is? The trapezium rule is IN THE FORMULAE BOOKLET!

And the other stuff like g and whatever, I still don't get where on earth you do the calculation in that? If suppose 2(3^3) + 4(3^2) - 18 = 0, and 2(3^3y) + 4(3^2y) - 18 also = 0, then HOW CAN y BE A DECIMAL THING? Please help me out here :/

 

[Ayesha B]

I GOT THE FRIKKIN TRAPEZIUM RULE WRONG! and guess what the worst part is? The trapezium rule is IN THE FORMULAE BOOKLET!

And the other stuff like g and whatever, I still don't get where on earth you do the calculation in that? If suppose 2(3^3) + 4(3^2) - 18 = 0, and 2(3^3y) + 4(3^2y) - 18 also = 0, then HOW CAN y BE A DECIMAL THING? Please help me out here :/

g( y ) *

 

[Hadi Murtaza]

So should we start discussing answers ??

 

[ahmed soliman]

yes please

So should we start discussing answers ??

 

[Hamzeh S]

So should we start discussing answers ??

dude how many marks for differentation question?

 

[ahmed soliman]

yes please

how u did cosine thing ?

 

[Ayesha B]

someone answer my question please.