[EvenStevens]

Agreed. They're the only ones that catch me out nowadays.

[Inquilaab]

I'm surprised that 58/75 was the boundary for 80UMS in Jan 2008..while it was 62/75 in Jan 2005..clearly the former was a harder/more ambiguous paper..

[Adjective]

We must be getting more daft.

[EvenStevens]

Question: Has anyone actually revised dot-products in M1?

Has anyone known it to come up in past papers? Or is it a safe bet to leave it alone... or d'ya think they'll spring it on us unawares O_o

[Adjective]

The only time I've ever come across a dot product is in C4. I can't imagine it coming up in M1. Is it in any textbooks?

[Inquilaab]

dot-product?!

[Tyrotoxism]

(Original post by EvenStevens)
Question: Has anyone actually revised dot-products in M1?

Has anyone known it to come up in past papers? Or is it a safe bet to leave it alone... or d'ya think they'll spring it on us unawares O_o

Dot products? As in C4 dot product rule?

[EvenStevens]

I'm sure I saw it in my M1 textbook at some point.

Though it is quite an old textbook, they've probably taken it off the syllabus by now.

[Inquilaab]

Yeah I haven't seen it in my book..(post 2004 spec.)

[Adjective]

For those of you that are interested:

Spoiler:

Show

The dot product of two vectors and is:

, or

, where is the angle between the two vectors.

But I believe the chance of your having to use it to be ~0.

[EvenStevens]

Ah, yes.
It's a 2000 spec text book.

No worries, false alarm :P

[EvenStevens]

I just did Jan 03, question 5...

I ended up going through C3 trigonometry to get there O_o

I got 11.3 as my answer, though. The markscheme cited "11.0". Is this just a case of Edexcel being their inaccurate selves?

I MUST have been correct... I didn't do that much to be wrong >_<

[Kyalimers]

(Original post by EvenStevens)
I just did Jan 03, question 5...

I ended up going through C3 trigonometry to get there O_o

I got 11.3 as my answer, though. The markscheme cited "11.0". Is this just a case of Edexcel being their inaccurate selves?

I MUST have been correct... I didn't do that much to be wrong >_<

Doubt it. You've probably gone wrong somewhere Steve. Edexcel hardly ever make mistakes on MS's but make **** loads on the papers.

[EvenStevens]

Yeah but I've noticed M1 markschemes tend to be laden with "AWRT", and often penalise for being *too* accurate with answers.

It could be certainly viable that I was correct...

[lilpenguin]

What does AWRT mean?

[EvenStevens]

Anything which rounds to.

[Kyalimers]

Steve, post the question.

I'll have a go at it.

[Kyalimers]

I say post it coz: wait for it: I don't have the paper on my PC and cba going through Rapidshare to dl it from my site

[lilpenguin]

LOL at sohanshah :P
Some times takes me AGES to see if it's a car or a dog :P

[Kyalimers]

(Original post by lilpenguin)
LOL at sohanshah :P
Some times takes me AGES to see if it's a car or a dog :P

They've started doing cats now. We have to distinguish between varieties of dogs next.

Pick the 4 letters with Labradors in them