Edexcel A2 C4 Mathematics June 2016 - Official Thread

As far as I know, it does apply? for example if you have the intersection point C, and two points A and B on either of the two lines, to work out the angle ACB, you can use the vectors CA and CB (as the direction of these vectors go away from the angle)!

They have to be in the same direction so either both inwards or both outwards

An integral I constructed for those who might be interested:

$\displaystyle \int_{\phi}^{\varphi }\sin\left ( \alpha x \right )e^{\left [ q\sin\left ( px \right ) \right ]^{2}} \ \mathrm{d}x$

where $\alpha = 2p$.

from the book it's (area using trapezium rule - integral calculation/integral calculation) x100

Yeah that's what i meant. The person said /area of trap which would be the approximation, not the integral calculation

any predictions on what may come up?? are you ready??

2015 question 8) b), how you get 2 and 0 as limits? Anyone? Please and Thank you!

No point predicting, i feel ready for it, just hope not to make silly mistakes.

yup same here am hoping its easier than the s*** that was in c3

Draw a line from the bottom of the vase, vertically up. The angle between each side of this line and the vase is 30 degrees. You should be able to recognise the right-angled triangles that appear, with sides h, r, and the side of the vase.


tan30 = opposite/adjacent = r/h.

nice

this c34 2016 IAL paper is beautiful

You just look at the graph? The limits for the area bound by R in terms of x are 2 and 0. The 2 comes from coordinate of P.

What do you think you got in c3? Should be i reckon as c3 was okay-hard

Where $\phi$ is the golden ratio?

That makes it more interesting, but it's just a constant.

Resurfacing:

$\displaystyle \int_{\phi}^{\varphi }\sin\left ( \alpha x \right )e^{\left [ q\sin\left ( px \right ) \right ]^{2}} \ \mathrm{d}x$

where $\alpha = 2p$.

When working out the volume of a cone why is the radius the distance of y axis and height distance of x axis and not the other way round ?

Yep Hopefully tomorrow's paper is the same let me know how it goes good luck!