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# Edexcel FP3 - 27th June, 2016 watch

• View Poll Results: How did you find the Edexcel FP3 exam?
Very hard
41
8.40%
Hard
69
14.14%
Normal
156
31.97%
Easy
165
33.81%
Very easy
57
11.68%

1. (Original post by Hineshtailor)
just a quick reminder, remember the formula for when the surface area revolution if y is rotated around the y axis
isn't it the same? but instead of the x coordinates you use the y coordinates
2. (Original post by Major-fury)
isn't it the same? but instead of the x coordinates you use the y coordinates
how do you find the distance between 2 lines in vectors?
3. (Original post by Major-fury)
how do you find the distance between 2 lines in vectors?
Well there are only two scenarios (when you think about it), they're either parallel and you have to find the distance or they're skew. Any other case and they'll intersect.

Say you had point A on line 1, and a general point B on line 2 (and they're parallel). You simply have to find the vector AB, and say the dot product with the line direction (it's the same for both lines) is equal to 0. This then gives you a value for the scalar parameter you used for the general point of B, and thus you can find the exact vector AB, and then it's magnitude, giving you the distance.
4. (Original post by cjlh)
2015 Q6 - what is going on with the area in part d? What method have they used

https://3a14597dd5c7aa2363f067571766...%20Edexcel.pdf
Anyone? I've never seen anything like that before
5. Praying for an easy paper 😭😭
6. The Symmetry of THIS hyperbola ( not every hyperbola) make an angle of 90 degree, so you only need to take 1/2x|OQ|x|OR|
you should check last question, question 8c, it is driving me crazy for that one
7. (Original post by Major-fury)
how do you find the distance between 2 lines in vectors?
If 2 lines are skew e.g. R1= (A)+t(B) R2=(C)+s(D). Then distance = |(A-C)crossproduct(B-D)| divided by |(B-D)|
8. (Original post by cjlh)
https://3a14597dd5c7aa2363f067571766...%20Edexcel.pdf

Q7b - what does that notation mean?
Dot notation. Just means multiply (6 x 4 x 2)
9. Cannot sleep properly last night... My last but most important exam hope I will do well and wish for a standard paper
10. gl you brave people
11. Good luck today

A hard conics will screw me.
12. If the position vectors a, b, c have scalar product 0 does that mean the origin, a, b, and c lie on the same plane
13. Good luck everyone! We're all amazingly brave for taming the beast that is FP3.

If I see these four words, which will forever haunt me, "find the locus of..." Ima go die during the exam
14. (Original post by flairs)
If the position vectors a, b, c have scalar product 0 does that mean the origin, a, b, and c lie on the same plane
Not necessarily as they could be perpendicular in any direction. I assume you mean a•(bxc), if that equals 0 then you have a plane as your volume is 0.
15. Yes but not necessarily through the origin.
(Original post by flairs)
If the position vectors a, b, c have scalar product 0 does that mean the origin, a, b, and c lie on the same plane
16. A bif late but all the best guys!
17. good paper, praying for 100ums 👐
18. Gud luk pple

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19. Come on people NUMBERS NUMBERS NUMBERS
20. (Original post by physicsmaths)
Gud luk pple

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Do you remember any of the answers?

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