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    can someone please help me. i'm looking for a song that has 'lalala' repeated in it and has lots of clapping. its quite catchy and sounds similar to something that the ting tings would release.
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    (Original post by unknownking321)
    can someone please help me. i'm looking for a song that has 'lalala' repeated in it and has lots of clapping. its quite catchy and sounds similar to something that the ting tings would release.
    Possibly Gobbledigook by Sigur Ros

    http://www.youtube.com/watch?v=zfKw5r7M7MQ
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    :no: but thanks for trying. anyone else?
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    (Original post by unknownking321)
    can someone please help me. i'm looking for a song that has 'lalala' repeated in it and has lots of clapping. its quite catchy and sounds similar to something that the ting tings would release.
    That sounds a lot like Lady Gaga's 'Bad Romance'??
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    (Original post by bittersweet.poetry)
    That sounds a lot like Lady Gaga's 'Bad Romance'??
    :no: i'd have recognised that song

    the song i'm looking for may have actually been something like 'nanana' and the clapping sounds like the first few seconds of this song

    http://www.youtube.com/watch?v=hlYMoSubtHc
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    Im really good at the whole of this module (for once), except trig!!! Its so annoying
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    doing solomon papers is demotivating
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    (Original post by Pheylan)
    sin(x + 2x) - sinx = 0
    sinxcos2x + sin2xcosx - sinx = 0
    sinx(1 - 2sin^2(x)) + 2sinxcos^2(x) - sinx = 0
    sinx - 2sin^3(x) + 2sinxcos^2(x) - sinx = 0
    sinx - 2sin^3(x) + 2sinx(1 - sin^2(x)) - sinx = 0
    sinx - 2sin^3(x) + 2sinx - 2sin^3(x) - sinx = 0
    2sinx - 4sin^3(x) = 0
    sinx - 2sin^3(x) = 0
    sinx(1 - 2sin^2(x)) = 0
    I'm ashamed to ask... but can you please solve this? I was never good at C2 ;_; I still don't know C2 trig that well nor do I know circles.

    And, I just remembered. Is it possible for them to ever bring back circles in C3?
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    I watched Lesbian Vampire Killers last night, and there was a song near the beginning, when you first see the girls, coming out of the bar. All I can remember is the word 'Woman' (I'm guessing the name of the song), as I was quite tired. It's bugging me as to what it is as I've heard it before. Any one know?
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    (Original post by Doughboy)
    I'm ashamed to ask... but can you please solve this? I was never good at C2 ;_; I still don't know C2 trig that well nor do I know circles.

    And, I just remembered. Is it possible for them to ever bring back circles in C3?
    isnt is just sinx=0 or sinx=+/- (root)1/2?
    where does circles come from? xx
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    (Original post by Doughboy)
    I'm ashamed to ask... but can you please solve this?
    sure

    sinx(1 - 2sin^2(x)) = 0

    sinx = 0

    1 - 2sin^2(x) = 0
    2sin^2(x) = 1
    sin^2(x) = 1/2
    sinx = +/- sqrt(1/2)
    x = arcsin(+/- sqrt(1/2))

    so x = 0 degrees
    x = 45 degrees
    x = -45 degrees

    although it was 0 < x < 360, so

    x = 0
    x = 45
    x = 135
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    I have s1 s2 and c3 this month!
    out of the 3, i've done soooo much C3, but not enough of the other two


    I haven't read the thread but in addition to the OP the edexcel past papers
    there is:

    edexcel mock paper, edexcel specimen, c3 paper at the back of the c3 book
    5 edexcel practise papers
    12 solomon papers
    12 elmwood papers (not reccomended, all are significantly harder than usual)

    stuck for more papers... anyone?
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    (Original post by indie_couture)
    isnt is just sinx=0 or sinx=+/- (root)1/2?
    where does circles come from? xx
    Oh, circles come in no where! That was just me whining :rolleyes:
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    (Original post by Pheylan)
    sure

    sinx(1 - 2sin^2(x)) = 0

    sinx = 0

    1 - 2sin^2(x) = 0
    2sin^2(x) = 1
    sin^2(x) = 1/2
    sinx = +/- sqrt(1/2)
    x = arcsin(+/- sqrt(1/2))

    so x = 0 degrees
    x = 45 degrees
    x = -45 degrees

    although it was 0 < x < 360, so

    x = 0
    x = 45
    x = 135
    O_O

    Isn't it:

    sinx=0
    x=0, x=180, x=360

    sinx=\pm \sqrt{1/2}
    x=-45, x=45, x=135, x=225

    :eek3:

    Seems correct, init?
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    (Original post by Doughboy)
    O_O

    Isn't it:

    sinx=0
    x=0, x=180, x=360

    sinx=\pm \sqrt{1/2}
    x=-45, x=45, x=135, x=225

    :eek3:

    Seems correct, init?
    ah yeah i forgot about 180 and 360, but -45 is out of the range and 225 is wrong
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    (Original post by Pheylan)
    ah yeah i forgot about 180 and 360, but -45 is out of the range and 225 is wrong
    Ok yes -45 is wrong.

    But 225 is right.

    sin(225*3) - sin225 = 0

    Just add -45 to 270 (to get negative sin in 4th quadrat).
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    Just youtubed it and it is! thankyou so much, it was drivingme crazy
    such an amazing song
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    can anyone help with graphs, domains, range etc?

    When it says draw the graph y=a-x or 2x-2a

    It should be easy but I am rubbish at graphs! xx
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    Im usually really good at C3 but could somebody help with this question, as I just can't get the right answer.

    Simplify:
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    (Original post by OrangeStu)
    Im usually really good at C3 but could somebody help with this question, as I just can't get the right answer.

    Simplify:
    -x + \dfrac{x^2}{(x-2)} - \dfrac{20}{x^2+x-6}

    -x + \dfrac{x^2}{x-2} - \dfrac{20}{(x-2)(x+3)}

    \dfrac{-x(x^2+x-6)+x^2(x+3)-20}{(x-2)(x+3)}

    \dfrac{-x^3-x^2+6x+x^3+3x^2-20}{(x-2)(x+3)}

    \dfrac{2x^2+6x-20}{(x-2)(x+3)}

    \dfrac{(2x+10)(x-2)}{(x-2)(x+3)}

    \dfrac{2x+10}{x+3}

    :cool: I verified my answer using different values of x. Seems I am correct

    I've noticed that factorising quadratic expressions is key here.
 
 
 
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