Mathematics: Post your doubts here!

[Adhiraj Shinde]

w

View attachment 16912
Hope this answers it

wow amazing.thank you sooo very much.u made all my concepts clear.i hope we can be of great help to each other in solving such questions.once again a big thanks

 

[Adhiraj Shinde]

u

Post the link as well then i'll b able to help u

already helped me very well.thanks

 

[Adhiraj Shinde]

http://www.xtremepapers.com/papers/...S Level/Mathematics (9709)/9709_s11_qp_31.pdf
Q no-8 ii) and iii)
I am clear how to find the greatest value of argument in normal cases.but this seems a bit offbeat for me.if someone could help pls.

 

[Kirabo Takirambudde]

Adhiraj, dude heres the working, but it a fairly common question so make sure u understant it.. let me know if you cant read my handwritting!

 

[Kirabo Takirambudde]

hmmm. intersesting, hahah, does the question require an exact answer or a rounded off one?

 

[PhyZac]

Srry for lateness brother, but it seems that your doubt have already been cleared.

Jazaka Allah anyway! May Allah reward !

Hmm, another doubt, sorry but math isnt easy! nightrider1993

Question


Answer

 

[D0cEngi]

Here you go, the workings:



Hope this helps. Peace.

wat u did in the second step...? y u multiplied it with 1/ cos A cos B ??

 

[Minato112]

Jazaka Allah anyway! May Allah reward !

Hmm, another doubt, sorry but math isnt easy! nightrider1993

Question
View attachment 17001

Answer
View attachment 17002

 

[PhyZac]

Jazaka Allah minato112...Got it Alhamdulilah..............Thank you!

 

[Minato112]

Jazaka Allah...Got it Alhamdulilah..............Thank you!

No prob!

 

[whitecorp]

wat u did in the second step...? y u multiplied it with 1/ cos A cos B ??

To transform the expression, at the same time maintain the mathematical integrity of things.

 

[D0cEngi]

To transform the expression, at the same time maintain the mathematical integrity of things.

Thank you sir....

 

[whitecorp]

Thank you sir....

No problem. Peace.

 

[luniaz226]

what's the step by step solution for question 1?

 

[Minato112]

what's the step by step solution for question 1?

Here are the answers. Hope it helps.

 

[Pals_1010]

Hello, I need help on the last part of this question.

I got the equation like in the mark scheme but how do you get x approaches 10 for the last part?

Thanks

 

[kronix6]

Hi can anyone help me in ths question. I dnt know what to do in the second part.

Question is : the parametric equation of a curve are x=2cost , y=5+3cos2t , where 0<t<pie .
Express dy by dx in terms of t, and hence show that the gradient at any point of the curve is less than 6.

 

[whitecorp]

Hi can anyone help me in ths question. I dnt know what to do in the second part.

Question is : the parametric equation of a curve are x=2cost , y=5+3cos2t , where 0<t<pie .
Express dy by dx in terms of t, and hence show that the gradient at any point of the curve is less than 6.

dy/dt = -6sin2t, dx/dt= -2sint

dy/dx = dy/dt divided by dx/dt = -6sin2t/-2sint = 3sin2t /sin t =3 (2sint cost)/sin t = 6 cost
Since 0<t<pi, -6 <6cost <6 (shown)
Note that dy/dx denotes the gradient function of the curve at a generic point for a parameter value of t.

Hope this helps. Peace.

 

[Jspake]

hmmm. intersesting, hahah, does the question require an exact answer or a rounded off one?

It has an exact answer..

 

[whitecorp]

I am reposting this.. is anyone willing to help me??

The diagram shows the graph of y = x^n, where n is an integer. Given that the curve passes between the points (2, 200) and (2, 2000), determine the value of n.

Please explain the solution step-by-step.. thanks!

What exactly do you mean by passing between the points? Does the curve pass through those two given points?

If it does, you may wish to check if you have provided the correct set of coordinates. It is obvious the graph is strictly increasing but yet your two points have the same x-values (which means the strictly increasing nature of the graph automatically breaks down).

Peace.