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    (Original post by sj97)
    Sorry, last minute question:
    https://a086a5a2f39bda93734c56a63fab...%20Edexcel.pdf
    THen how do you integrate the cosec^2 2x bit?
    integrate cosec^2 x is a standard result on the c3 differentiation formula sheet
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    (Original post by studentwiz)
    how do you recognise intergration, can someone explain method of recognition for intergration
    too late now ... all recognition can be done by substitution
    make sure you can substitute
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    soo nervous for thissssss
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    (Original post by Jimmy_M)
    Attachment 429549

    How would you solve e? I did it as two separate triangles, one with acute angle 77, the other with obtuse angle 102, but the mark scheme has it as the acute angled triangle multiplied by two?? AX is 2rt6, angles 77.16 and 102.84
    same thing!!
    sin 77.16 = sin 102.84 !!
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    (Original post by candol)
    Are we talking vectors?
    eg OB = OA + 2AX
    For example Q 6 part d on June 2013 Paper R
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    (Original post by TeeEm)
    here it comes
    Do you happen to have the mark scheme for it too?
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    Thoughts on tabular integration? Much quicker method if you need to use by parts more than once

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    can someone please help on 8b june 2015 IAL paper how do i integrate 1/sin4y
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    Hi, do I need to know the volume of a cone and volume of a sphere formulae for connected rate of change questions, or will it always be given?
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    (Original post by Ocean3)
    For example Q 6 part d on June 2013 Paper R
    OB' = OB + 2BA i think without having done the question
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    (Original post by TeeEm)
    too late now ... all recognition can be done by substitution
    make sure you can substitute
    do you think the paper would be harder this year?
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    (Original post by Maham88)
    can someone please help on 8b june 2015 IAL paper how do i integrate 1/sin4y
    cosec4y=-1/4ln(cosec4y+cot4y) +c
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    (Original post by Ripper Phoenix)
    Even if you had to integrate try integration by substitution

    Posted from TSR Mobile
    It would be wayyy easier to intergrate by partial fractions

    (x)/(x+1) would become 1 - 1/(x+1) which would intergrate to x - ln(x+1)
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    Can someone help with part ii

    I know that a.b=|a||b| when two lines are parallel but I have too many unknowns
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    (Original post by Mathsyy)
    Hi, do I need to know the volume of a cone and volume of a sphere formulae for connected rate of change questions, or will it always be given?
    it's better if you know it
    I think there are some formulas on the formula booklet on the c1 page..

    but it's better if you know it just to be sure
    sphere volume = 4/3 pi r^3
    Area of a sphere = 4 pi r^2
    Area pyramid/cone= pi r h/3
    cylinder area = pi r^2 h
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    (Original post by frozo123)
    cosec4y=-1/4ln(cosec4y+cot4y) +c
    thats what i did but are they doing here page 9 https://a48aca6bcd82b5ada594d7397b73...%20koli248.pdf
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    Can someone help me on part iiI know that when two lines are parallel a.b=|a||b| but then I have too many unknowns Name:  image.jpg
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    i just feel like I'm going to fail. Why did I pick maths :banghead:
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    As long as there isn't a really big difficult vectors question I'll be fine
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    (Original post by Maham88)
    thats what i did but are they doing here page 9 https://a48aca6bcd82b5ada594d7397b73...%20koli248.pdf
    Look at part a of that question... It literally gives you it
 
 
 
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