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# m2 question watch

1. 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
2. (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 to elminate theta.

Your figures are slightly different as they've not combined the 0.5, but should work out the same.
3. (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 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
4. 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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