OCR (not MEI) C2 - Wednesday 20th May 2015

Anyone know where the mark would be given for question 9 (iv)???

Reply 382

EconEast

6

Original post by Orangeflower360

How did you do it??

one side was like 2cos1/3x = sin1/3x --- something like that
you divide by cos1/3x to get 2 = tan1/3x
then 1/3x = arctan2 which gives you one value, you add 180 to that value to get the other value. then you now have two values of 1/3x = u and v, to get x on its own you times those two answers, u and v, by 3, which gives 3.3... and 12.7...

Reply 383

Peppercrunch

14

The exam was difficult. Quite a few people cried after the exam, including me.

I couldn't do the last question. I messed up the 2N thing, but I think I got method marks though as my maths teacher said I did some parts right.

There goes my hopes for an A in Maths. Wouldn't mind a B though.

Reply 384

exoticmedgirl_2017

Markscheme been posted yet?

Reply 385

Orangeflower360

Original post by PrathamM

one side was like 2cos1/3x = sin1/3x --- something like that
you divide by cos1/3x to get 2 = tan1/3x
then 1/3x = arctan2 which gives you one value, you add 180 to that value to get the other value. then you now have two values of 1/3x = u and v, to get x on its own you times those two answers, u and v, by 3, which gives 3.3... and 12.7...

TBH i got the 3.3 wth didnt i add the 180 degrees my dayss idiot right here :') thank you for taking the time!

Reply 386

dogs98

how many marks will you get if you just integrated the equation twice then found the equation of the curve by finding C

Reply 387

Parallex

6

if anyone can pm me a pic of the questions I can do a mark scheme with solutions

Reply 388

how many marks will you get if you just integrated the equation twice then found the equation of the curve by finding C

Reply 389

Peppercrunch

14

Original post by dogs98

how many marks will you get if you just integrated the equation twice then found the equation of the curve by finding C

Did you get somewhere along the lines of 4x^3/2 - 7x - 5?
You probably lost one or two marks if you missed out the second term.

Reply 390

i integrated the equation twice dats it and worked out the value of c by subbing in the values of x and y

Reply 391

DominoMatrix227

Original post by Peppercrunch

The exam was difficult. Quite a few people cried after the exam, including me.

I couldn't do the last question. I messed up the 2N thing, but I think I got method marks though as my maths teacher said I did some parts right.

There goes my hopes for an A in Maths. Wouldn't mind a B though.

What did you get for the 2N thing? I got -44 and 125/3 which I think are both wrong.

Didn't you do any of 9?

Reply 392

Original post by shakz98

i integrated the equation twice dats it and worked out the value of c by subbing in the values of x and y. how many marks will i get

dff fgg

Reply 393

DominoMatrix227

What do you suppose 61 or 62 might be?

Reply 394

Rubberduckiller

Original post by DominoMatrix227

What did you get for the 2N thing? I got -44 and 125/3 which I think are both wrong.

Didn't you do any of 9?

how many marks do u thing -44 will get me

Reply 395

how many marks will i get if i got 4x^3/2 +c. I cant remeber my value of c

Reply 396

DominoMatrix227

Original post by Rubberduckiller

how many marks do u thing -44 will get me

I have already asked this, I have no idea! How did you fin d the rest of the paper?

Reply 397

rogdog

Original post by DominoMatrix227

What did you get for the 2N thing? I got -44 and 125/3 which I think are both wrong.

Didn't you do any of 9?

I think i got -44, but i can't remember it was so hard that question

Reply 398

Dom1997