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Edexcel AS/A2 Mathematics M1 - 8th June 2016 - Official Thread watch

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    (Original post by sss786)
    -i+j=0 ??
    then can you rearrange to get j=i

    thanks
    Well the i and j components have equal magnitude but opposite direction (assuming you are taking east and north as the positive directions in usual fashion)
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    [QUOTE=13 1 20 8 42;65547879]Well the i and j components have equal magnitude but opposite direction (assuming you are taking east and north as the positive directions in usual fashion)[/QUOTE

    Thank you,
    What other scenarios can they give other than north west?

    Thanks
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    Hey, how much does it matter that I used a method that the mark scheme doesn't mention? I get the correct answer but I have used a different SUVAT equation than specified in the mark scheme.

    Since the exam is in 9 hours can you please answer this quickly?
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    North-West = positive j and negative i
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    Nortwest= positive i negative j
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    Otherway round mate

    Posted from TSR Mobile
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    do we need to know sine and cosine rules??
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    do we need to know sine and cosine rules
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    Hey, quick question - how many significant figures do we leave are answers to

    AND, do we leave it as a fraction if we can
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    (Original post by dripper)
    Hey, quick question - how many significant figures do we leave are answers to

    AND, do we leave it as a fraction if we can
    3 sf or 2 dp
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    (Original post by dripper)
    Hey, quick question - how many significant figures do we leave are answers to

    AND, do we leave it as a fraction if we can

    3 sf or 2 dp
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    Never fractions, right? I.e. if the answers 5/7 I'd like it as 0.714?
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    (Original post by dripper)
    Never fractions, right? I.e. if the answers 5/7 I'd like it as 0.714?
    Well i dont think it really matters, as in the mark scheme it allows both
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    (Original post by dripper)
    Never fractions, right? I.e. if the answers 5/7 I'd like it as 0.714?
    Whenever a numerical value of g is required, take g = 9.8 ms^-2 and give your answer to either two or three S.F.
    So if you are not using g it is fine to leave the answer as a fraction.
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    (Original post by TercioOfParma)
    Hey, how much does it matter that I used a method that the mark scheme doesn't mention? I get the correct answer but I have used a different SUVAT equation than specified in the mark scheme.

    Since the exam is in 9 hours can you please answer this quickly?
    As long as you use a suvat equation with the correct signs (+ or -) and get the right answer then it will be fine. Doesn't have to be the one stated in the mark scheme and obviously examiners get a much more detailed MS.
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    (Original post by student bang)
    do we need to know sine and cosine rules
    yh you might need to apply them especially when working with vector triangles.
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    (Original post by student bang)
    do we need to know sine and cosine rules
    Its helpful for say a triangle of forces question makes it easy to solve. Just go over it shouldnt take long, its basic C2 stuff (cosine/ sine rule)
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    what is vector triangles
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    (Original post by student bang)
    Nortwest= positive i negative j
    Postive i negative J is south east
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    (Original post by Unknow_n123)
    As long as you use a suvat equation with the correct signs (+ or -) and get the right answer then it will be fine. Doesn't have to be the one stated in the mark scheme and obviously examiners get a much more detailed MS.
    What about if, with the questions with like tan(theta) = 3/4, i just put in cos(arctan(3/4) instead of the value of theta or precalculating it??
 
 
 
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