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Math Help - Need help with grade 12 vectors (basic question) and a calc question about a curve

  1. #1
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    Talking Need help with grade 12 vectors (basic question) and a calc question about a curve

    Hi everyone, I am new here.
    I am having trouble with question 3 and 8, 9 the most. But I pretty much don't get all of it, I would really appreciate your help,

    Christy
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  2. #2
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    Re: Need help with grade 12 vectors (basic question) and a calc question about a cur

    I can help, what have you done to answer these?
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  3. #3
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    Re: Need help with grade 12 vectors (basic question) and a calc question about a cur

    Hi! I've done this so far:
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  4. #4
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    Re: Need help with grade 12 vectors (basic question) and a calc question about a cur

    As well as this:

    9. v can be broken down to y = sin40 x 5 and x = –cos 40 x 5

    w can be broken down to y = 2 sin55 and x = 2 cos 55

    now we want to replicate w, to match y, 5 sin40 / 2 sin 55 = 0.5 of v is needed

    to match x, (2 cos 55 + 5cos 40 )/4 = 1.24 of u is needed (but in the opposite direction tho),

    so w = 0.5 v -1.24 u



    But I had help from my friend who can skip steps really quickly and so what I really want to know is the steps...
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