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# FP3 Polar Curves Watch

1. A couple harder polar curves questions. I didn't make any useful progress

Can anyone do questions 7 and 8? 7 b ii onwards
2. (Original post by Lucasium)
A couple harder polar curves questions. I didn't make any useful progress

Can anyone do questions 7 and 8?
Any specific parts you're stuck on?
3. the first part of q7 is easier if you reflect the curve in the line y = x ... then it is just a simple integral wrt x. the limits are not hard to find.
4. (Original post by Zacken)
Any specific parts you're stuck on?
All apart from 7 a and 7bi
5. (Original post by Lucasium)
All apart from 7 a and 7bi
7(b) (ii) is simple a matter of recognising that and so your equation becomes after which, some re-arranging and simplifying and solving for in terms of gets you where you need to be.
6. (Original post by Zacken)
7(b) (ii) is simple a matter of recognising that and so your equation becomes after which, some re-arranging and simplifying and solving for in terms of gets you where you need to be.
I tried but only got this far
7. (Original post by Lucasium)
A couple harder polar curves questions. I didn't make any useful progress

Can anyone do questions 7 and 8?
1=cos(0) from here you can use the (half?) angle formulas that are included in C3 but were most likely not taught in detail.
8. (Original post by Lucasium)
I tried but only got this far
Bit unwieldy?

From which it suffices to see that must be positive so you take
9. (Original post by Olipoo)
1=cos(0) from here you can use the (half?) angle formulas that are included in C3 but were most likely not taught in detail.
For which question?
10. (Original post by Lucasium)
For which question?
Given that you've repped my post, I take it you've understood - in which case, can you then see how the integral is a multiple of which is the area of something you've already found so adjusting for the multiple gets you the required answer.
11. (Original post by Lucasium)
For which question?
7c
12. Good work guys, I appreciate it. Let's move on to question 8
13. (Original post by Lucasium)
Good work guys, I appreciate it. Let's move on to question 8
Same thing, write re-arrange, blah blah.
14. (Original post by Zacken)
Same thing, write re-arrange, blah blah.
These questions are harder than usual aren't they? I haven't had such an issue before
15. (Original post by Lucasium)
These questions are harder than usual aren't they? I haven't had such an issue before
I wouldn't know - I'm not on your exam board, so I'll defer to your judgement.
16. (Original post by Zacken)
I wouldn't know - I'm not on your exam board, so I'll defer to your judgement.
I've just received news that the booklet is a mix of aqa and MEI, so concern over. It's no excuse but it makes me feel a little better
17. (Original post by Lucasium)
I've just received news that the booklet is a mix of aqa and MEI, so concern over. It's no excuse but it makes me feel a little better
18. (Original post by Argylesocksrox)
I suppose I'll take and upload pictures tomorrow, it's a big booklet
19. (Original post by Lucasium)
I suppose I'll take and upload pictures tomorrow, it's a big booklet
Thanks mate

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