Edexcel FP3 June 2015 - Official Thread

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Na I mean grip rule.
The thumb is direction of normal vector. With direction vectors being the turn from a to b ie axb.

Posted from TSR Mobile

I am fairly certain you mean FLHR given your explaination :tongue:

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This is the grip rule:

image.jpg32.1KB

Reply 561

bwr19

Original post by Gome44

I am fairly certain you mean FLHR given your explaination :tongue:

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This is the grip rule:

But the grip rule is to do with magnetic fields.

He means just another 'rule' that uses the right hand. Similar to that but the thumb shows the direction of the normal and the thumbs point from a to be in axb.

Reply 562

bwr19

June 2014 question 6 is an absolute pain and involves virtually no FP3 stuff apart from the fact the context is an ellipse. What a disgusting question. Hope nothing like that comes up for us.

Reply 563

math42

Original post by bwr19

June 2014 question 6 is an absolute pain and involves virtually no FP3 stuff apart from the fact the context is an ellipse. What a disgusting question. Hope nothing like that comes up for us.

I agree; it's a horribly designed question. I just want it to be another simple "find the value of a" one rather than loci :colondollar:

Reply 564

nayilgervinho

Does anyone have general notes on hypothesis testing

Reply 565

bwr19

Original post by nayilgervinho

Does anyone have general notes on hypothesis testing

Think you're meant to be in the S2 thread. :P

http://www.thestudentroom.co.uk/showthread.php?t=3156207

Reply 566

Elcor

June 2012 was a crap paper. It's not hard, it's just genuinely bad. It's one where you're only 80% sure what you're doing most of the time.

Reply 567

violin101

Any tips or tricks on spotting the method to use for reduction formulae? I though I was getting somewhere and then tried June '14 R paper and got no where with it :frown:

Reply 568

nayilgervinho

Original post by bwr19

Think you're meant to be in the S2 thread. :P

http://www.thestudentroom.co.uk/showthread.php?t=3156207

Oh right I keep on switching between the two.

Reply 569

Teddysmith123

Can someone please help me with 8c june 2010?

https://2d31ca6ec4f6115572728c3a9168ad5dfc897f33.googledrive.com/host/0B1ZiqBksUHNYSjAyWFYyQmU5Tjg/Edexcel-Set-2/Ch.2%20Further%20Coordinate%20Systems.pdf

Reply 570

username1259045

Original post by mmms95

June 2014 ial question 5a
markscheme https://3a14597dd5c7aa2363f0675717665774b02557b0.googledrive.com/host/0B1ZiqBksUHNYQWE5bVRTVE9BLW8/June%202014%20(IAL)%20MS%20%20-%20F3%20Edexcel.pdf

qustion paper https://3a14597dd5c7aa2363f0675717665774b02557b0.googledrive.com/host/0B1ZiqBksUHNYQWE5bVRTVE9BLW8/June%202014%20(IAL)%20QP%20-%20F3%20Edexcel.pdf

also questions 7a, how to you simplify 720^3/2 x2/9 ???? calc doesn't give exact ans???

and question8d, i don't understand why they have used 2i+j+3k as the point a i thought A in the vector equation of a line is a point on the line, but they have used the direction vector of it???

can someone please answer this?? this is really stressing me out ahah :P

(edited 8 years ago)

Reply 571

violin101

Original post by Teddysmith123

generate co-ordinates for Q and then sub them in for x and y and show that the locus given is true

Reply 572

ravelhua

Original post by Teddysmith123

Did you mean June 2010 8b

Reply 573

violin101

Original post by mmms95

June 2014 ial question 5a
markscheme https://3a14597dd5c7aa2363f0675717665774b02557b0.googledrive.com/host/0B1ZiqBksUHNYQWE5bVRTVE9BLW8/June%202014%20(IAL)%20MS%20%20-%20F3%20Edexcel.pdf

qustion paper https://3a14597dd5c7aa2363f0675717665774b02557b0.googledrive.com/host/0B1ZiqBksUHNYQWE5bVRTVE9BLW8/June%202014%20(IAL)%20QP%20-%20F3%20Edexcel.pdf

i don'tt understand where they got the sin^2(theta) in the first line of the markscheme?? split up cos^n(x) to cos(x)cos^n-1(x) and got v=sinx so where did they get sin^2(x) ???

(by x i mean theta, x is just faster to type)

also questions 7a, how to you simplify 720^3/2 x2/9 ???? calc doesn't give exact ans???

and question8d, i don't understand why they have used 2i+j+3k as the point a i thought A in the vector equation of a line is a point on the line, but they have used the direction vector of it???

sin^2(x) as differential of cos^(n-1)(x) is (n-1)cos^(n-2)(x)sin(x)

not sure about the others and I need to look at S2 aha

Reply 574

Teddysmith123

Original post by violin101

generate co-ordinates for Q and then sub them in for x and y and show that the locus given is true

and I have found out what x and y= and I subbed them in but I don't understand how to simplify it

I have 16cos^2t+64sin^2tcos^t all over (1+4sin^2t)^4

how do I simplify this further?

Original post by ravelhua

Did you mean June 2010 8b

Yes I meant that one