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

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North-West = positive j and negative i

(edited 7 years ago)

Nortwest= positive i negative j

Otherway round mate

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do we need to know sine and cosine rules??

do we need to know sine and cosine rules

Hey, quick question - how many significant figures do we leave are answers to

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

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

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

Never fractions, right? I.e. if the answers 5/7 I'd like it as 0.714?

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

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.

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.

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.

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)

what is vector triangles

Original post by student bang

Nortwest= positive i negative j

Postive i negative J is south east

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??

Original post by student bang

what is vector triangles

https://www.youtube.com/watch?v=rq8WOfPNQ-k

For anyone wanting to look over a decent lift question check JUNE 2015 Question 4.

Original post by hamzahussain97

https://www.youtube.com/watch?v=rq8WOfPNQ-k

Thanks and what are the key feature of displacement acceleration and speed-time graphs

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