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

    the question should read

    "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.
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    (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

    the question should read

    "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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    Name:  ImageUploadedByStudent Room1438374902.633611.jpg
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    First time i did it i didnt reject cosx=-4/5 hence getting ectran ans of -8.


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    (Original post by physicsmaths)
    Name:  ImageUploadedByStudent Room1438374902.633611.jpg
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    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?
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    (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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    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
  1. File Type: pdf Q32, Saturday 01-08-15.pdf (15.8 KB, 57 views)
  2. File Type: pdf Q32, Saturday 01-08-15, EXTRA.pdf (14.1 KB, 51 views)
  3. File Type: pdf Q32, Saturday 01-08-15, solution.pdf (76.1 KB, 39 views)
  4. File Type: pdf Q32, Saturday 01-08-15, EXTRA, solution.pdf (165.7 KB, 39 views)
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    (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)) ?
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    (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
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    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
  5. File Type: pdf Q33, Sunday 02-08-15.pdf (11.3 KB, 48 views)
  6. File Type: pdf Q33, Sunday 02-08-15, EXTRA.pdf (8.8 KB, 48 views)
  7. File Type: pdf Q33, Sunday 02-08-15, solution.pdf (166.8 KB, 36 views)
  8. File Type: pdf Q33, Sunday 02-08-15, EXTRA, solution.pdf (87.6 KB, 112 views)
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    (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

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    (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 ...
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    (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
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    (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
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    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!
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    (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
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    (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..
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    (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...
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    (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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