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    For question 5 I have resolved horizontally and vertically using the Impule equation and obtained:

    k=3.5cos(theta) - 6

    k=7.5sin(theta)


    I'm unsure of where to go from here, I don't understand what the mark scheme has done, or should I try and find theta using trigonometric identities?

    thanks

    QP: https://ca99c64778b62ba7e7b339967029...%20Edexcel.pdf

    MS: https://ca99c64778b62ba7e7b339967029...%20Edexcel.pdf
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    (Original post by Katiee224)
    For question 5 I have resolved horizontally and vertically using the Impule equation and obtained:

    k=3.5cos(theta) - 6

    k=7.5sin(theta)


    I'm unsure of where to go from here, I don't understand what the mark scheme has done, or should I try and find theta using trigonometric identities?
    k=7.5cos(theta) - 6 Typo, I presume.

    If you're following the first of the three given solutions, then they've rearranged each of the two equations to get 7.5sin(theta)=..., 7.5cos(theta)=....
    Then square each and add, using the identity \cos^2\theta+\sin^2\theta=1 to elminate theta.

    Your figures are slightly different as they've not combined the 0.5, but should work out the same.
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    (Original post by ghostwalker)
    k=7.5cos(theta) - 6 Typo, I presume.

    If you're following the first of the three given solutions, then they've rearranged each of the two equations to get 7.5sin(theta)=..., 7.5cos(theta)=....
    Then square each and add, using the identity \cos^2\theta+\sin^2\theta=1 to elminate theta.

    Your figures are slightly different as they've not combined the 0.5, but should work out the same.
    I get it now thanks
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    Hi, I just gave this question a go and am stuck at

    (costheta-sintheta)=12/15

    I have not done c3, what should I do from here?
 
 
 
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