Maths, Addmaths and Statistics: Post your doubts here!

[MarcoReus]

It reminds me of when times used to be easy. Plus, great to help out on a question every now and then if one can, I feel.

P.S: Anoud's done with O Levels too. Jussayin.

Leave that, help me with the important thing. How does Marco Verratti play? :/ Nothing on Google.

 

[Dark Destination]

Is The Oct-Nov 2011 paper 12 add maths marking scheme wrong in question 9? ._.

If it's not, that question is really tough!

 

[***amd***]

Is The Oct-Nov 2011 paper 12 add maths marking scheme wrong in question 9? ._.

If it's not, that question is really tough!

link plz?

 

[Dark Destination]

link plz?

http://papers.xtremepapers.com/CIE/...matics - Additional (4037)/4037_w11_qp_12.pdf

 

[AbbbbY]

Is The Oct-Nov 2011 paper 12 add maths marking scheme wrong in question 9? ._.

If it's not, that question is really tough!

Should be sin4x + 4xcos4x. What does the marking scheme say?

 

[Dark Destination]

Should be sin4x + 4xcos4x. What does the marking scheme say?

Why sin4x? :/

That's what it says.

 

[***amd***]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics - Additional (4037)/4037_w11_qp_12.pdf

i got it right

 

[***amd***]

Why sin4x? :/

That's what it says.

we use the "product rule"

 

[Dark Destination]

we use the "product rule"

Oh, so the x is a function..

How do we know when to use product rule? :/

If there was a 5 (in place of x) instead of xsin4x... 5sin4x.. would we still use product rule?

 

[***amd***]

Oh, so the x is a function..

How do we know when to use product rule? :/

If there was a 5 (in place of x) instead of xsin4x... 5sin4x.. would we still use product rule?

function x ka hai to it means u have 2 functions to differentiate.

 

[AbbbbY]

Why sin4x? :/

That's what it says.

Like amd said, product rule. How else did you differentiate an expression with 2 variables

 

[AbbbbY]

Oh, so the x is a function..

How do we know when to use product rule? :/

If there was a 5 (in place of x) instead of xsin4x... 5sin4x.. would we still use product rule?

5 is a constant. x is a variable. You'll use product rule when you have 2 variables.

 

[Dark Destination]

Like amd said, product rule. How else did you differentiate an expression with 2 variables

I differentiated by considering x as a constant

Like 5sin4x -- > 5*4 cos4x

xsin4x --> 4xcos4x

I didn't think of applying the product rule ._.

This is all due to lack of practice :/

 

[Hamza_Akmal]

What is the differnentiation of 5cosx + 2cosy ???

 

[***amd***]

What is the differnentiation of 5cosx + 2cosy ???

-5 sinx - 2 siny

 

[mohammad ahmed]

http://papers.xtremepapers.com/CIE/...matics - Additional (4037)/4037_s13_qp_21.pdf

q10

plzz solve this with diagram

 

[M.Omar]

What is the differnentiation of 5cosx + 2cosy ???

not possible....not same variable

-5 sinx - 2 siny

No this cant be ...simple as tht

 

[Faizan Muhammmad]

not possible....not same variable

No this cant be ...simple as tht

yes it isnt possible
we have to differentiate with respect to x OR y but not both

 

[TheJinchuuriki9]

I am having problems with relative velocity vectors(the i j form) Please help my paper is on tuesday.

 

[***amd***]

not possible....not same variable

No this cant be ...simple as tht

oh, yes, we'll have to make an eq first, right?