Mathematics: Post your doubts here!

[RoOkaYya G]

I totally lost my control over vectors.
I need to do that topic again :'(
How can dis happen to me

aww poor u
dw ull get hold on it again

 

[Haya Ahmed]

I just know one thing here :
f (x) = sin (x) / x

dy/dx = [ d/dx (sin (x) ) * x - (sin (x) ) * d/dx (x) ] / x²

dy/dx = [ cos (x) * x - (sin (x) ) ] / x²

dy/dx = [ xcos (x) - sin (x) ] / x²

dy/dx = ( x cos (x) / x² ) - ( sin (x) / x² )

dy/dx = ( cos (x) / x ) - ( sin (x) / x² )

LOL ... you didn't take numerical solutions ?

 

[Thought blocker]

LOL ... you didn't take numerical solutions ?

I am into fixing my problems atm.
Can't u read it?

 

[Haya Ahmed]

I am into fixing my problems atm.
Can't u read it?

ohh no !! .. Numerical equations is a chapter in the maths A2 -- syllabus ... thats why

 

[Thought blocker]

ohh no !! .. Numerical equations is a chapter in the maths A2 -- syllabus ... thats why

You are posting all A2 level questions science a month or a two.

 

[Haya Ahmed]

You are posting all A2 level questions science a month or a two.

so you didn't take maths a2 ?

 

[Thought blocker]

so you didn't take maths a2 ?

I do. But I dont wanna shit my pants for now :/

 

[Haya Ahmed]

I do. But I dont wanna shit my pants for now :/

LOL .. did you that that chapter yet ?

 

[Thought blocker]

LOL .. did you that that chapter yet ?

Nup. What is iteration?

 

[Haya Ahmed]

w

Nup. What is iteration?

ell .. no need to ruin your day .. you'll come to know it later xD

 

[Thought blocker]

w

ell .. no need to ruin your day .. you'll come to know it later xD

I know -_-

 

[MafaldaC]

abcde credits. (Part ii)
i)
T = F and F = μR
T = μR
From the figure you can see T = 2N and R = 3N and μ = T/R = 2/3

ii)
As the system is in limiting equilibrium, the tension would equal A's weight i.e. 2N.
As A is about to move upwards, B is about to move rightwards. So the frictional force now will be in the same direction as the tension.
First, analyse the vertical forces.
In equilibrium, R + 1.8 = 3. => R = 1.2 N.
Considering forces horizontally, X = 2 + 2/3 (1.2) = 2.8 N.

Thank you!!!

 

[MafaldaC]

Help with these questions pleasee

 

[Thought blocker]

Help with these questions pleasee

RoOkaYya G Math master solution

Q3)
https://www.xtremepapers.com/commun...st-your-doubts-here.9599/page-718#post-872045

 

[Thought blocker]

Mathematics November 14 papers A level :
qp-P1 : http://justpastpapers.com/9709_w14_qp_12/
ms-P1 : http://justpastpapers.com/9709_w14_ms_12/
qp-P3 : http://justpastpapers.com/9709_w14_qp_32/
ms-P3 : http://justpastpapers.com/9709_w14_ms_32/
qp-M1 : http://justpastpapers.com/9709_w14_qp_42/
ms-M1: http://justpastpapers.com/9709_w14_ms_42/
qp-S1 : http://justpastpapers.com/9709_w14_qp_62/
ms-S1 : http://justpastpapers.com/9709_w14_ms_62/

 

[Haya Ahmed]

how to find the direction as I got -84.1 ... it i given in the answers at the back 5.9° below 100N can someone explain this please !!?

 

[Thought blocker]

how to find the direction as I got -84.1 ... it i given in the answers at the back 5.9° below 100N can someone explain this please !!?

342.48?

 

[Haya Ahmed]

342.48?

nope 292N !!

 

[Thought blocker]

nope 292N !!

IDK :/

 

[Thought blocker]

nope 292N !!

I get 290.5 but not 292 :/