Mathematics Corner :)

The Ruler said:
S2 anyone?
Click to expand...

:eek: S2?? I still can't believe I'd survived even a single module of statistics, lol...how'd it go?

crayon said:
I just realized I have to do Logic&Geometry and Statistics next year in uni.. Geometry I don't mind so much, but statistics.....
Click to expand...

Within journalism, though, that sounds kinda cool :D.

And yup, wish you guys the best of luck on all the rest!
 
The Ruler said:
It was terrible and was the catalyst to make me lose all hope that ever resided in me. TT_TT
Click to expand...

Statistics can do that to a person.

Don't freak, the applied module's always unreliable...but C3 and C4 will be fine, I'm sure...if you totally understand the basics, there's only so bad those papers can be ^_^. You'll get what you want...
 
^me too... in certain questions, but I think I'm ok on the basics... Post up questions you're not sure on and maybe we can have a stab together. It'll possibly help me as well...
 
Arghhh, I totally hate vectors too...it's one thing when all you have to do is find the vector equation of a line, or calculate magnitudes and scalar products of vectors...but entirely another to use this to prove random geometric properties...

It sometimes helps to list out the different kinds of questions they usually ask, and outline the method you need for each...the usual ones are things like finding out whether two lines are parallel/skew, finding the point of intersection if there is one, finding the angle between two lines, etc...(although I'm not entirely sure about Edexcel, of course).
Just practising questions is definitely the best idea...
 
For some funky reason I have it down as tan x only. Hmmh.

But how do I integrate 1 + tan^2 x?
 
Ahh, if you wanna integrate, just keep it as sec^2 x...the integral of sec^2 x is simply tanx; it's one of the ones you'll (hopefully) have in a formula booklet...
 
The Ruler said:
What identity would you use to turn 1/(cos^2 x) into tan x?
Click to expand...

This is one where one has to think in a simple way, here we have to multiply top and bottom by 1. Now that sounds a bit pointless unless you realise that (I have left out the x for convenience) Cos^2+ Sin^2 = 1. Then we get

(cos^2 + Sin^2)/Cos^2 = cos^2/cos^2 + sin^2/Cos^2 = 1 + tan^2 (because sin^2/cos^2 = tan^2)

Well I am a bit rusty but I think that is right

 
Am I right when I say that you can differentiate sin^2 x directly but you can't integrate it directly? To integrate it, you'd need to use the double angle fomula for cos 2x, right?
But how do I differentiate it? d/dx(sin^2 x) = 2 sin x cos x... Which = sin 2x?
 
Yup, exactly...hmmm, I never really took that in before...that you get sin2x when you differentiate sin^2 x. Cool, lol...
 
x = 2 cot t, y = 2 sin^2 t

Would the cartesian equation in the form y=f(x) be:

y = 8/(4 + x^2) ?
 
I might have to boycott the vector questions and just do the rest.
 
Uthmān;1167226 said:
I might have to boycott the vector questions and just do the rest.
Click to expand...

Ditto that. I'm still wondering what point vectors and directional vectors are. Well, I understand them, but the question makes it hard to understand what they're looking for. I especially hate a.b = |a||b| cos theta. Tch.
 

Similar Threads

Back
Top