Mathematics: Post your doubts here!

[Heyyy]

Please someone do these questions:

 

[A star]

yeah it was a riot -_-
i was like #)$*#@)%()$@!&%!@#)$( through the whole paper X_X It felt like i was doing p3 for the first friggin time... i've forgotten everrrything!!! :O :O :O
Yar sorry stupid xpc didnt seem yo work. I have a project to submit by next week!!!

yeah sure.... take ur time =)

 

[daredevil]

q.4(ii) .. initial value is not given so choose eg, pi/4 and plug it in the equation given .
then you 1.32 ( radians measure ) , plug this in equation and you get value , and plug in eqn again till you get a constant value of 1.33.

q.5(ii) we got dy/dx = 2sin^2 t *cos^2 t .. so to find gradient of tangent we need to substitute t value in dy/dx ..
we are given x - value ( 0 ) .. so find t value by substituting x=o in x=ln(tant) ,, we get t =1/4 pi .
. substitute in dy/dx to get gradient of tanget .. so get gradient = 0.5 .. use y=mx +c to find C .. hence you get eqn .

q.7(b) for |z| < 2 draw circle with centre at origin and radius =2
for |z − 2 − 2i|. arrange to make z - ( ... ) so becomes z - ( 2 +2i ) .. draw at 2+2i ..real 2 and imaginery 2 ..and join to origin ...

thats where i can help

ooh so we can use any value of x in Q4??

and umm i didn't quite get the 7th question.... i got the circle part ... but wen u rearranged the second equation where is the |z| in :
|z|<|z-2-2i|

?? u just aaranged the r.h.s .... is this a perpendicular bisector or a half line?? I'm sorry but i'm really out of practice with the p3

Thanks a lot for the help!!

 

[daredevil]

ooh yeah okay.... take your time... i got the answer to a couple of questions already (see above)
buss saturday ko paper hai uss se pehley if possible to bata dena
otherwise... ah well fail to hona hi hai mocks mein

 

[daredevil]

I'll be posting up another paper with my problems if u guys are up for it
ahmed abdulla and A star

 

[Faithix MFSH]

Complex numbers question.
I would like some help with understanding how to interpret these three points and place them on a diagram, and perhaps then calculating the area of the thus formed triangle.

Thanks in advance. View attachment 37097

 

[Heyyy]

Complex numbers question.
I would like some help with understanding how to interpret these three points and place them on a diagram, and perhaps then calculating the area of the thus formed triangle.

Thanks in advance. View attachment 37097

Which paper is this question from?

 

[mania _ manal]

please help me with these questions http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s11_qp_61.pdf Q3
http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s12_qp_63.pdf Q2ii

 

[mania _ manal]

you're welcome

please help me with these questions http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s11_qp_61.pdf Q3
http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s12_qp_63.pdf Q2ii

 

[Faithix MFSH]

Which paper is this question from?

W13 PAPER33

 

[A star]

ooh yeah okay.... take your time... i got the answer to a couple of questions already (see above)
buss saturday ko paper hai uss se pehley if possible to bata dena
otherwise... ah well fail to hona hi hai mocks mein

haha not possible i am knee seep in trouble -_- stupid computing

 

[daredevil]

haha not possible i am knee seep in trouble -_- stupid computing

oohh damn... well khair hai... no prob

 

[RadzMau]

Hey, can anyone solve this Statistics 1 question number 9 on Discrete Random Variables question please?

 

[Faithix MFSH]

Complex numbers question.
I would like some help with understanding how to interpret these three points and place them on a diagram, and perhaps then calculating the area of the thus formed triangle.

Thanks in advance. View attachment 37097

 

[Heyyy]

Complex numbers question.
I would like some help with understanding how to interpret these three points and place them on a diagram, and perhaps then calculating the area of the thus formed triangle.

Thanks in advance. View attachment 37097

From what I've understood...
W lies in 1st quadrant i.e pi/4.
W^3 lies in 2 quad i.e 3pi/4
W* lies in. 4th quadrant ie -pi/4

Not sure how to calculate area of triangle
But I guess simply by finding the length of the sides...and plugging them in the formulae .

 

[Suchal Riaz]

Faithix MFSH

 

[Faithix MFSH]

View attachment 37329 Faithix MFSH

The e^ix +1 = 0 (Euler's identity) is actually derived from euler's formula ye^ix = y(cosx + isinx).

Thanks alot for simplification.

 

[Suchal Riaz]

Are u trying to tell me or ask me? Yes indeed it is derived from Euler's form.

The e^ix +1 = 0 (Euler's identity) is actually derived from euler's formula ye^ix = y(cosx + isinx).

Thanks alot for simplification.

 

[sitooon]

question 2 -
Mechanics 2
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w12_qp_53.pdf

 

[itallion stallion]

Can someone plz plz help me with this question
9709/03/O/N/07
Question 10 part 1.
Plz explain how to convert normal equation into Cartesian form!
Thanks a lot