[iPoo'd]

(Original post by TwilightKnight)
You once had to prove that Sinx/Cosx = Tanx, but that's simple enough.

When? and how do you prove that??

[M_I]

(Original post by sportycricketer)
which question is this? i'll try it!

Its in the thread, last page and some info to help diagram on this page.

My diagram looks like this, is it right?

I don't get how its a ramp.

[M_I]

(Original post by iPoo'd)
When? and how do you prove that??

Sin = O/H
Cos = A/H
Tan = O/A

Sin/Cos = (O/H)/(A/H) = O/A = Tan

[iPoo'd]

(Original post by M_I)
Sin = O/H
Cos = A/H
Tan = O/A

Sin/Cos = (O/H)/(A/H) = O/A = Tan

lol that wasnt hard. When did that come up?

[momo11]

I was wondering what shape volumes will you have to know form GCSE

[charliiiiii]

anyone have a link for edexcel past exam paper & mark scheme from summer 09 pleeeeeease? xx

[reedy007]

(Original post by M_I)
Its in the thread, last page and some info to help diagram on this page.

My diagram looks like this, is it right?

I don't get how its a ramp.

yep it looks like that but the other way round the ramp is ABP P is point on top

[reedy007]

(Original post by reedy007)
yep it looks like that but the other way round the ramp is ABP P is point on top

I meant APB sorry

[reedy007]

(Original post by M_I)
Its in the thread, last page and some info to help diagram on this page.

My diagram looks like this, is it right?

I don't get how its a ramp.

Its a right xxxx of a question isnt it

[MM1234]

(Original post by charliiiiii)
anyone have a link for edexcel past exam paper & mark scheme from summer 09 pleeeeeease? xx

It's an unofficial mark scheme though

[Mr van der WAALs]

(Original post by M_I)
Questions about June 09:

For question 6.b I used a different method, do I still get the marks? I found out the equation of PQ and showed that the centre lies on the line.

Question 7.ii) I don't understand how they got 318.6.

Thanks.

You should still get the marks for 6b);

7ii) 4sinx = 3tanx

4sinx - 3sinx/cosx = 0
4sinxcosx - 3sinx = 0
sinx(4cosx - 3) = 0

sinx = 0; cosx = 3/4

x = 0; x = 180

or x = 41.4; x = (360-41.4) = 318.6

[Da_hopeful_1]

How's c2 going everyone ?

[atofu]

I get confused with the Geometric series thing when it goes into banking/investment ._.
Do i just multiply it by the decimal multiplyer, to the power of years?

[*absinthe*]

just starting revision now got ph2 to do too gonna be a long night

[M_I]

(Original post by Mr van der WAALs)
You should still get the marks for 6b);

7ii) 4sinx = 3tanx

4sinx - 3sinx/cosx = 0
4sinxcosx - 3sinx = 0
sinx(4cosx - 3) = 0

sinx = 0; cosx = 3/4

x = 0; x = 180

or x = 41.4; x = (360-41.4) = 318.6

I'm so stupid, I done 270 + 41.4.....

[reedy007]

(Original post by M_I)
I'm so stupid, I done 270 + 41.4.....

have u managed to work that question out

[M_I]

(Original post by reedy007)
have u managed to work that question out

The ramp one...no lol i started physics revision, got it tomorrow....but I don't get the diagram, can't you use paint 2 draw it up quickly?

[Chemchemchem]

For the June 2005 paper what is the next step after
2p(x)=-q(x)
66p²(x²)=11q(x²)

How do you work out p and q? I don't understand the method in the markscheme. I know it has something to do with simultaneous equations.

Can someone help me?

[Dr Acula]

(Original post by Da_hopeful_1)
Who hasnt started c2 papers yet ?

Me I'm on chapter 1, oh FFS its going to be another all nighter, haven't slept since Sunday... am actually dying inside

[L-B]

what does 'cso' mean in the markscheme?