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    (Original post by harrytqo)
    the correct answer to question 7 was 9pi^2/8 +pi

    i got 9pi^2/8 - pi
    do yous think that would only lose 1 mark?
    I forgot to multiply by pi too
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    (Original post by 9clpc9)
    I forgot to multiply by pi too
    Howin gods name do you integrate sin^2(2x) i have been staring at it for about an hour and have made zero progress
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    Use the cos2θ = 1 - 2sin^2θ rule and rearrange for sin^2θ. Then just say θ = 2x and integrate.
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    (Original post by Golden hawk)
    Thought the paper was harder than usual tbh but these are the answers I got
    1. 2ln(x)-3ln(2-x)+c
    2i. root 26
    ii. r=(1,3,5) + λ(-3,4,-1)
    iii. No as λ is not constant
    3. pi/4, pi/2, 3pi/4 [+- for all of them].
    4i. 5/(2x+4)
    ii. (5/x)-1 Domain: x does not equal 0.
    iii. graph of the right hand side of an x^2 curve.
    iv(a). hg(x)
    iv(b). h^-1f(x)
    iv(c). gg(x)
    5i. Prove Differentiation.
    ii. Stationary point at (-2,-1) and it is a max with the value of d2y/dx2=-1/2
    6. Proving trig identity.
    7. volume= (9π^2/8)+π
    8.(1/2)e^2y=(1/2)x^2ln(x)-(1/4)x^2+(1/4)(2e^4+1)
    got the exact same value for 8 as you so thanks for the confidence boost haah!
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    (Original post by Mr.bob)
    Howin gods name do you integrate sin^2(2x) i have been staring at it for about an hour and have made zero progress
    Aww man Name:  image.jpg
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    Use the double angle formulae, hopefully this clears it up.


    Anyone doing S1 tomorrow?
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    (Original post by 9clpc9)
    Aww man Name:  image.jpg
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    Use the double angle formulae, hopefully this clears it up.


    Anyone doing S1 tomorrow?
    jeez i completely skipped over the double angle/compund formulae in revision (only did 2 past papers and they did not come up oops )
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    (Original post by Mr.bob)
    jeez i completely skipped over the double angle/compund formulae in revision (only did 2 past papers and they did not come up oops )

    Aww Yeah, I revised over them last night too and some in the morning 😂 Hopefully it'll be low grade boundaries this year since it was pretty hard
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    For question 5 ii i set dy/dx = 0 and found 2y=x

    i then found the second derivative and put x into it and got (0,0) as the stationary point and therefore 0 as the second derivative so a point of inflection. How many marks do you reckon i will lose?
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    For question 3 i was getting pi/6 and 5pi/6. Did the equation simplify to sinx = plus and minus 0.5
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    (Original post by Smcdonald98)
    For question 3 i was getting pi/6 and 5pi/6. Did the equation simplify to sinx = plus and minus 0.5
    ahhh forgot to take the square root
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    Did anyone do the S1?? If so, what did you think of it
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    Thought it was good. Probably the best maths paper this year. How about you?

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    (Original post by Niamh581)
    Thought it was good. Probably the best maths paper this year. How about you?

    Posted from TSR Mobile
    I thought it was a good paper. However, people got confused with question 6b. People either used a Venn diagram or a tree diagram. I don't know which method is right as when I keep going over it, I think of a tree diagram. What was your answer? I got 0.52 or something
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    I drew a Venn diagram maybe that's why I couldn't get an answer. Pretty sure I didn't get any marks for that whole question. The rest of of the paper was fine I thought

    Posted from TSR Mobile
 
 
 
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