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Edexcel FP2 Official 2016 Exam Thread - 8th June 2016 watch

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    That damn question 4b needs to use substitution and someone told me that it has appeared in one of the past papers
    wtf????
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    (Original post by zcy980528)
    someone tell me how to integrate e^2x.sinx
    Yes tell me. That question killed me!!
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    (Original post by OllieUnofficialW)
    32.5 something, i got theta as a nasty value like 0.723
    Ohhh Thanks god I got the same .. I have been so worried
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    (Original post by Chirstos Ioannou)
    I have
    How did you find it?
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    (Original post by Lilylollydove7)
    Yes tell me. That question killed me!!
    someone just told we need to use SUBSTITUTION
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    Well it seems like a uniform disaster for everyone. Low grade boundaries I'm thinking - but FP2 "low" boundaries are like 68/75 for an a*


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    (Original post by edothero)
    Would be good, except that's sinhx not sinx
    No not if I used Euler's relation
    e^ix = cosx + isinx
    e^-ix = cosx - isinx
    (e^ix - e^-ix)/2 = 2isinx/2
    then idk if you can do this but i took the i out of all of it to get (e^x - e^-x)/2 = sinx
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    (Original post by zcy980528)
    someone tell me how to integrate e^2x.sinx
    IBP and then you get the e^2xsinx again and have to add it to both sides and divide - very mean!


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    No complex transformations either.. Spent so long revising them too. Christ sake edexcel
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    (Original post by sameenshaw)
    someone just told we need to use SUBSTITUTION
    Nah, parts


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    Question 4 Integral Solution

    Question 4b

    let In=e^2x*sinx

    By parts twice gives

    In= 0.5e^2x*sinx - 0.25e^2x*cosx - Integral of 0.25e^2x*sin x
    Integral of 0.25e^2x*sin x = 0.25 InHence, 5/4 In = 0.5e^2x*sinx - 0.25e^2x*cosxTherefore In = 1/5e^2x * (2sinx - cosx)
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    **** Edexcel *******s!! FP2 is usually guaranteed 75, that was atrocious!
    The tell arsey he can't do mark schemes and now they violate is in FP2.
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    (Original post by HarshaPeed)
    I'm probably really stupid for doing this but I kept it as costheta= 3/4 and used arcos3/4 all the way through. Lord help me.
    Nah you're not that gives you the most accurate answer

    (Original post by zcy980528)
    someone tell me how to integrate e^2x.sinx
    Integration by parts twice to get the integral of e^(2x)sin(x) on both sides, then you can rearrange to find the integral of e^(2x)sin(x)
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    did anyone manage question 5? I couldn't get 53/480 for my final answer........
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    (Original post by Lilylollydove7)
    Yes tell me. That question killed me!!
    I used Euler's relation to get everything in terms of e
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    (Original post by zcy980528)
    someone tell me how to integrate e^2x.sinx
    Use integration by parts twice and you will get I=.......-4I
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    anyone confident about what x tends towards as t tends to infinity? I guessed infinity, anyone know???
    this is question 4a or 4b I think.
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    Grade boundaries should be kind if it was very tricky. Like last year's FP3 was absurdly low.
    I can spare/want to spare myself an hour of analysis revision so if anyone linked the paper I could probs do solutions. Doubt they will/can though but just putting it out there
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    Predict the FP2 grade boundaries here:
    http://www.thestudentroom.co.uk/showthread.php?t=4149979
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    (Original post by anhaanha)
    Ohhh Thanks god I got the same .. I have been so worried
    Same, arccos of 3/4, i need to have done well in every other Q to make up for Q4
 
 
 
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