You are Here: Home >< Maths

# OCR C3 (not MEI) Official Thread - Tuesday 21st June 2016

Announcements Posted on
TSR's new app is coming! Sign up here to try it first >> 17-10-2016
1. (Original post by HecTic_H)
Going to guess:
41 - C
47 - B
53 - A
59 - A*
Really difficult paper imo.
I don't think they'll be that low, a little bit higher maybe 55-A?
A*-62 A-56 B-49 ?
3. (Original post by daniellon)
is the new equation x(-2x+5) and -cos*-1(-x)?
Yeah
4. For the integration question i found the area of trapezium and then substracted the area underneath the curve from it.

how many marks will i get
5. (Original post by connorbarr)
sinBsec^2B=27cosBcosec^2B?
Yes thats the one thanks! I messed up somehow and got tanB = 27 😭
6. What was the question for where everyone is getting pi/6? Like what did the question ask again?
7. (Original post by mil88)
I got all but 81.92 part.

I got 65.5.. and thus 66.
Greater than or equal to 3a
8. What did people get for the number next to t in question 3 so then they could find the mass?
9. I am pretty sure f(x) >= 3a because it was mod(2x + a) + 3a so if x = -1/2a you get f(x) = 3a
10. Hi,
What was question 9iib?
11. (Original post by underestimate)
Hi,
What was question 9iib?
pi/6
12. (Original post by Agent47_)
pi/6
What did we have to find out, like the equation given
13. Can anyone remember the 1st equation you had to integrate in Q2?

Think it was something like (4-1/x)^5

If so, wouldn't the answer be x^2/6(4-1/x)^6...with no ln ?
14. (Original post by underestimate)
What did we have to find out, like the equation given
It was something like sin4x(tanx + cotx) = 1

Posted from TSR Mobile
15. (Original post by jonnydowe)
For 2i), it says these two equations are equivalent, are they? I got the second one through integration by inspection and I'm still concerned they're not.
Anyway, if not I'm at 69/72 I think. Hope that's 100ums but you can never be sure. Hoping C4 will be solid now.
16. (Original post by GM16)
It was something like sin4x(tanx + cotx) = 1

Posted from TSR Mobile
Thank you!
17. (Original post by zintanax)
For the one about modulus, I only got 1 answer as x = 1.5a because when you draw the graphs they only intersect once - did anyone else get that?
I did this! I discredited the second answer (I tried subbing it back in but it didn't work so thought it must be invalid).
18. (Original post by Agent47_)
pi/6
Thanks!
19. If I wrote all real values for y for the range do I get any marks?
20. Plugging pi/6 into a calculator gives 2, not 1, it was 0.6something

Posted from TSR Mobile

## Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
2. this can't be left blank
3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
1. Oops, you need to agree to our Ts&Cs to register

Updated: August 21, 2016
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Today on TSR

### How does exam reform affect you?

From GCSE to A level, it's all changing

Poll
Useful resources