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    Ok basically i was in a hurry and wrote arccos as arcos (spelling mistake) would i lose marks?
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    Can you do 4b using c.f/p.i method?
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    Does anyone know the question for the first order question (part a) i
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    (Original post by cjlh)
    You get dy/du but the squared I got was of (du/dx). You know du/dx is 1/x so this is 1/x^2 (which you then substitute in).
    :O ... I didnt rearrange x=e^2u (is that what it was or was it e^u?) as ln|x|=2u
    Instead I attempted to straight away differentiate x with respect to y and then flip it which I think led me very off track, cheers for the reply
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    (Original post by AhnafR)
    Guys what did you get for the area of the polar curves? I got 71.0 or 49pi/2 + (3root7)/4 -11arccos3/4
    Should have been 49pi/4, not /2, but other than that yes
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    (Original post by AhnafR)
    Guys what did you get for the area of the polar curves? I got 71.0 or 49pi/2 + (3root7)/4 -11arccos3/4
    No it's 32.5

    For some reason you had 49pi/2 but it's 49pi/4. Other than that the other 2 terms are correct
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    (Original post by physics_maths7)
    :O ... I didnt rearrange x=e^2u (is that what it was or was it e^u?) as ln|x|=2u
    Instead I attempted to straight away differentiate x with respect to y and then flip it which I think led me very off track, cheers for the reply
    I think it was just x=e^u, so u=lnx. No probs, there's a few ways to do it if you look at past mark schemes so you'll probably have gotten at least 1 mark haha
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    (Original post by Mattematics)
    So I've confused myself on redoing part b of the polar co-ordinates question.

    I did this, and I'm struggling to see why I only got 15 rather than 35. Surely this gives the required area?

    2.\frac{1}{2}\int_{0.722}^{\frac  {\pi}{2}}(7cos\theta )^2 + \frac{(2 * 0.722)}{2\pi}*(r)^2

    First part evaluates to 8.64 and the second part evaluates to 6.33, giving a total of ~15?

    Bro, the second bit is wrong. You don't have to divide (theta) by 2i. The formulae is in radians so there's no need for that.😲
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    (Original post by Zacken)
    Will release one tomorrow.
    Ah! Can't wait, Appreciate it!
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    (Original post by AhnafR)
    Ok basically i was in a hurry and wrote arccos as arcos (spelling mistake) would i lose marks?
    No.
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    hi ,
    tbh it was too iz for me,
    i fought they wld make it a bit challenging coz its the third fp module.
    well see ya later nerds get good scrubs
    looking forward to fp3 for another 100ums
    lots of love,
    ms wier
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    What was the value of x as t tends to infinity on the first order diff eqn question?
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    (Original post by ApieceOFsoap)
    hi ,
    tbh it was too iz for me,
    i fought they wld make it a bit challenging coz its the third fp module.
    well see ya later nerds get good scrubs
    looking forward to fp3 for another 100ums
    lots of love,
    ms wier
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    Nice try at trolling
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    How many marks do you guys think I've lost if I didn't integrate e^2θ sinθ and left it in term of the integral?
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    To be honest, apart from Q4, they were all standard questions. There were two obvious ways to approach 4b, one was treating it as a 1st order differential and finding the integrating factor etc. and the second method was differentiating it again and treating it as a 2nd order then solve. A*-70?
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    What did people get on the e^2xsinx business? I think i got y = 2/5sinx - 1/5cosx +1/5e^-2x or something like that
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    Ok guys how do you integrate e^2xsinx and what did you guys get for the answer to that question?
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    For 4b) I used the first order from part a and equated things to r p and q. Will I get 0 marks for this do you think ?
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    TSR Support Team
    (Original post by Baldwinator)
    Did anyone else still have an e^u they were unable to get rid of in their equation after they'd substituted in Q7a? If the x^2 in front of the first term of equation 1 was instead an x I'd have got the answer.


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    OMGG, yes. I did.

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    (Original post by InkBuilder)
    How many marks do you guys think I've lost if I didn't integrate e^2θ sinθ and left it in term of the integral?
    I did this too but further showed Integration by parts once. I reckon 4-5 marks lost, not the end of the world
 
 
 
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