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1. (Original post by rcmehta)
Is it just r = +/- 1/2 for multiple values?
Of course haha, knew I'd forgotten something! Thanks
2. (Original post by JM-97)
Of course haha, knew I'd forgotten something! Thanks
You're welcome

Extra seems interesting... How many possible values are there?
3. ATTENTION for the EXTRA for FRIDAY

there is a typo again but it does not affect the question or the method, just the answers

the way the question is typed you will get as answers 4 and 16/5

"find the value of 7cosx+6sinx" in which case you get as answers 2 and 6.

Just to understand how these errors occur.
I had the question originally as you have it but I did not like the 16/5 as the answer.
I improved it so it has integer answers, but I forgot to retype the question.
4. (Original post by TeeEm)
ATTENTION for the EXTRA for FRIDAY

there is a typo again but it does not affect the question or the method, just the answers

the way the question is typed you will get as answers 4 and 16/5

"find the value of 7cosx+6sinx" in which case you get as answers 2 and 6.

Just to understand how these errors occur.
I had the question originally as you have it but I did not like the 16/5 as the answer.
I improved it so it has integer answers, but I forgot to retype the question.
So I wasn't wrong and I realised after that -8 was rejected.
I thought i was going wrong somewhere hoenstly. When will your solution be up?

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5. First time i did it i didnt reject cosx=-4/5 hence getting ectran ans of -8.

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6. (Original post by physicsmaths)

First time i did it i didnt reject cosx=-4/5 hence getting ectran ans of -8.

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Did you use a calculator?
7. (Original post by TeeEm)
Did you use a calculator?
No i got i nice quadratic and nice fractions so bo need. The work is what i have written there.

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8. 12 days to A level results

Question forSaturday 01/08/15
AS Level Maths Upwards

and for those who want that little bit extra,
AS level Maths Upwards required
Attached Images
9. Q32, Saturday 01-08-15.pdf (15.8 KB, 57 views)
10. Q32, Saturday 01-08-15, EXTRA.pdf (14.1 KB, 51 views)
11. Q32, Saturday 01-08-15, solution.pdf (76.1 KB, 39 views)
12. Q32, Saturday 01-08-15, EXTRA, solution.pdf (165.7 KB, 39 views)
13. (Original post by TeeEm)
12 days to A level results

Question forSaturday 01/08/15
AS Level Maths Upwards

and for those who want that little bit extra,
AS level Maths Upwards required
In the first question, I am not sure how to start does PiPi act as a function of a function like f(g(x)) ?
14. (Original post by JM-97)
In the first question, I am not sure how to start does PiPi act as a function of a function like f(g(x)) ?
I am not sure if I fully understand your question but I think If I understood it correctly yes it does.

you apply the innermost product first, then the outermost
15. 11 days to A level results

Question for Sunday 02/08/15
AS Level Maths Upwards

and for those who want that little bit extra,
AS level Maths Upwards required
Attached Images
16. Q33, Sunday 02-08-15.pdf (11.3 KB, 48 views)
17. Q33, Sunday 02-08-15, EXTRA.pdf (8.8 KB, 48 views)
18. Q33, Sunday 02-08-15, solution.pdf (166.8 KB, 36 views)
19. Q33, Sunday 02-08-15, EXTRA, solution.pdf (87.6 KB, 112 views)
20. (Original post by TeeEm)
11 days to A level results

Question for Sunday 02/08/15
AS Level Maths Upwards

and for those who want that little bit extra,
AS level Maths Upwards required
For extra
Spoiler:
Show

Is it (10^(n +1) - 10 - 9n)/81
Or factorising to 10(10^n - 1) for the first bit; I guess that may be considered simpler

21. (Original post by 13 1 20 8 42)
For extra
Spoiler:
Show

Is it (10^(n +1) - 10 - 9n)/81
Or factorising to 10(10^n - 1) for the first bit; I guess that may be considered simpler

looks very familiar... sorry i cannot check I sorting my site and I am all over the place ...
22. (Original post by TeeEm)
looks very familiar... sorry i cannot check I sorting my site and I am all over the place ...
Ah fair enough. I subbed/checked for a few n values so if it's familiar it's probably good, thanks
23. (Original post by 13 1 20 8 42)
Ah fair enough. I subbed/checked for a few n values so if it's familiar it's probably good, thanks
excellent
24. ATTENTION

for those who find these questions too easy or are just bored try to solve

cotθ + 3tanφ = 3
3sinθ + 2cosφ = 4

I know the answer because I made it ... but I cannot solve it yet!
25. (Original post by 13 1 20 8 42)
For extra
Spoiler:
Show

Is it (10^(n +1) - 10 - 9n)/81
Or factorising to 10(10^n - 1) for the first bit; I guess that may be considered simpler

I just checked
You are correct
26. (Original post by TeeEm)
I just checked
You are correct
Great thanks I started with the trig one using a systematic/"normal" approach but the equations get out of hand..
27. (Original post by 13 1 20 8 42)
Great thanks I started with the trig one using a systematic/"normal" approach but the equations get out of hand..
they beat me too ... I spend about an hour on them but I was to busy with other things so I threw the towel.

They are so annoying because one would assume if you know the answers and make them balance, surely they cannot be too bad to solve them analytically...
28. (Original post by TeeEm)
ATTENTION

for those who find these questions too easy or are just bored try to solve

cotθ + 3tanφ = 3
3sinθ + 2cosφ = 4

I know the answer because I made it ... but I cannot solve it yet!
Calculator or non calc? Ill do it in the morning
I assume you want the infinite solutions?

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