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    http://www.school-portal.co.uk/Group...urceId=3992069

    how would you do question 3)b)

    Please show me
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    (Original post by Westeros)
    Integral of 2/(2x-1) you wrote as ln|2x-1| is this correct?
    Also don't forget +C on your second line
    It is because you have to divide by the differential within the brackets
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    (Original post by keromedic)
    I've no idea how to draw graphs from parametric equations. Eek
    Don't worry, not on the specification.
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    (Original post by orange94)
    Well I did! You right!

    Unless anyone here objects to 1/3 being pulled out.

    Here is what I did

    Attachment 227735


    Posted from TSR Mobile
    Cheers I had to put it in a weird form in terms of p using the limits, but got there eventually.

    Posted from TSR Mobile
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    (Original post by Jskalkut)
    It is because you have to divide by the differential within the brackets
    (Original post by PythianLegume)
    Do you think it isn't? One of us is missing something here.
    Just testing
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    (Original post by otrivine)
    http://www.school-portal.co.uk/Group...urceId=3992069

    how would you do question 3)b)

    Please show me
    It involves treating it as (1/2)[sin(3x+x) + sin(3x-x)] It's a ridiculously difficult identity to see, and I doubt an actual C4 paper would have it.
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    (Original post by Westeros)
    Just testing
    Glad to be kept on my toes
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    (Original post by otrivine)
    http://www.school-portal.co.uk/Group...urceId=3992069

    how would you do question 3)b)

    Please show me
    Manipulate the addition identities from C3 formulae sheet.

    If you have sin3xcosx

    Then sin (3x + x) = sin3xcosx + cos3xsinx (1)
    then sin (3x - x) = sin3xcosx - cos3xsinx (2)

    Therefore sin (3x + x) + sin (3x - x) = sin3xcosx (1) + (2)

    therefore sin4x + sin2x = sin3xcosx

    therefore just integrate sin4x + sin2x
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    (Original post by Kardy)
    Manipulate the addition identities from C3 formulae sheet.

    If you have sin3xcosx

    Then sin (3x + x) = sin3xcosx + cos3xsinx
    then sin (3x - x) = sin3xcosx - cos3xsinx

    Therefore sin (3x + x) + sin (3x - x) = sin3xcosx

    therefore sin4x + sin2x = sin3xcosx

    therefore just integrate sin4x + sin2x
    I see! that was a hard one to identify okay,

    did you do

    sin3xcosx + cos3xsinx - ( sinxcosx - cos3xsinx)

    sin3xcosx + cos3xsinx ?

    then ?...

    thank you
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    can anyone tell me the basic rules for differentiation of ln and e^x
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    (Original post by otrivine)
    http://www.school-portal.co.uk/Group...urceId=3992069

    how would you do question 3)b)

    Please show me
    Using the product to sum formula.

    I've written it at the bottom on this sheet. The first one is the one that is relevant.

    They are derived from the C3 trig. identities seen in the top right hand corner.(landscape)

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    having panic attack
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    (Original post by fayled)
    Don't worry, not on the specification.
    But it's in the book? Admittedly, just converting to Cartesian form and then drawing or drawing up a table of values before then drawing, but it's definitely in the book!
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    Does anyone know of a link to the current Edexcel A Level Mathematics Specification?
    The one listed on their website currently points to a 404.
    http://www.edexcel.com/migrationdocu...2%20180510.pdf
    • Welcome Squad
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    (Original post by otrivine)
    I see! that was a hard one to identify okay,

    did you do

    sin3xcosx + cos3xsinx - ( sinxcosx - cos3xsinx)

    sin3xcosx + cos3xsinx ?

    then ?...

    thank you

    Hi, is the answer -1/8cos4x - 1/4cos2x + c before putting the limits in?
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    (Original post by amin666)
    having panic attack
    Calm down, it'll be fine! Don't panic
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    (Original post by Fortitude)
    Hi, is the answer -1/8cos4x - 1/4cos2x + c before putting the limits in?

    It is and you could have taken out the -1/2 as a constant. But that makes no difference.
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    (Original post by Fortitude)
    Hi, is the answer -1/8cos4x - 1/4cos2x + c before putting the limits in?
    Correct, can you show me please
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    Does anyone have a (link to)/(copy of) the current Edexcel A Level Mathematics Specification?
    The one linked on their website currently points to a 404.
    http://www.edexcel.com/migrationdocu...2%20180510.pdf
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    (Original post by MasterYi)
    It is and you could have taken out the -1/2 as a constant. But that makes no difference.
    do you have working for that question by any chance
 
 
 
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