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    good luck guys!!
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    Hey guys, quick question about doing second order differentials:

    When you're working out the complimentary function, and you're left with an answer that can be written like e^{x}[A\text{cos}(x) + B\text{sin}(x)] does it actually matter if you write an "i" after the B? (e.g. e^{x}[A\text{cos}(x) + Bi\text{sin}(x)]). I did it by accident while practicing and I'm unsure whether I'd get the marks.
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    (Original post by Pholl)
    Hey guys, quick question about doing second order differentials:

    When you're working out the complimentary function, and you're left with an answer that can be written like e^{x}[A\text{cos}(x) + B\text{sin}(x)] does it actually matter if you write an "i" after the B? (e.g. e^{x}[A\text{cos}(x) + Bi\text{sin}(x)]). I did it by accident while practicing and I'm unsure whether I'd get the marks.
    Probably lose like one for accuracy slip, surely no more than two
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    Are there any key areas I should focus on tonight?
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    (Original post by nayilgervinho)
    Are there any key areas I should focus on tonight?
    Polar coordinates.


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    (Original post by 13 1 20 8 42)
    Probably lose like one for accuracy slip, surely no more than two
    Hmm. But, unless I'm missing something, if i is a constant, and B is a constant, then surely an answer of "Bi" wouldn't technically be wrong, it would just be adding an unnecessary value to the answer that could be included with the constant. So are you saying the marks would be lost for not writing the answer in its simplest form?

    (Either way, for tomorrow's exam I'll be sure to remember to not add the i )
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    (Original post by Pholl)
    Hmm. But, unless I'm missing something, if i is a constant, and B is a constant, then surely an answer of "Bi" wouldn't technically be wrong, it would just be adding an unnecessary value to the answer that could be included with the constant. So are you saying the marks would be lost for not writing the answer in its simplest form?

    (Either way, for tomorrow's exam I'll be sure to remember to not add the i )
    i is imaginary. It's wrong, because it should a real constant, not an imaginary one.
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    (Original post by Alex:)
    i is imaginary. It's wrong, because it should a real constant, not an imaginary one.
    Ah. Gotcha. That makes sense, thanks for the help
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    (Original post by Pholl)
    Hmm. But, unless I'm missing something, if i is a constant, and B is a constant, then surely an answer of "Bi" wouldn't technically be wrong, it would just be adding an unnecessary value to the answer that could be included with the constant. So are you saying the marks would be lost for not writing the answer in its simplest form?

    (Either way, for tomorrow's exam I'll be sure to remember to not add the i )
    Have you even done FP1 lol, i is not real lol.


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    (Original post by physicsmaths)
    Have you even done FP1 lol, i is not real lol.


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    Never said it was. Just didn't consider the fact that the constants A and B have to be real.
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    I can't even do most of TeeEm's four star questions...what realistic chance do you think I have of getting an A?
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    (Original post by jf1994)
    I can't even do most of TeeEm's four star questions...what realistic chance do you think I have of getting an A?
    How have you been doing in normal papers?


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    (Original post by physicsmaths)
    How have you been doing in normal papers?


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    Mostly A's, couple of A*'s, but I'm just concerned that those results may not be reliable because of reusing the few past papers that there are.
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    (Original post by jf1994)
    Mostly A's, couple of A*'s, but I'm just concerned that those results may not be reliable because of reusing the few past papers that there are.
    No point getting worried now. Just chill now and do a few questions. Good luck bro! Stay calm, it is very important.


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    (Original post by physicsmaths)
    No point getting worried now. Just chill now and do a few questions. Good luck bro! Stay calm, it is very important.


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    I guess so, and best of luck to you too
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    FP2 papers don't tend to throw awkward stuff at you, thus, the main difficulty is algebraic slog.

    Routinely check questions, make sure your algebra is sound, use your calculator to check questions, do the question multiple times.
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    Where can I find TeeEm's questions?
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    Any last min advice? Good luck everyone! What are you all doing tonight on the night before the exam? I'm not sure whether to call it a night with revision or not
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    (Original post by imyimy)
    Any last min advice? Good luck everyone! What are you all doing tonight on the night before the exam? I'm not sure whether to call it a night with revision or not
    Call it a night i would, being fresh is much then doing a few more questions.


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    Praying for a kind transformations question
 
 
 
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