Mathematics: Post your doubts here!

[Muslimah98]

A stone is projected vertically upward with a speed of 21 m/ s .find the distance travelled by the stone in the first 3 seconds of its motion . Plzzz anyone help me out

is this an AS question? Is air resistance negligible?

 

[ahmed abdulla]

can someone tell me how they resolved for moments of weight of sector ..
they say its 20 × OGcos(π /3 –θ ) but why they minused θ

q7 . M2 .. m'j 13 .. va. 51

 

[abruzzi]

http://papers.xtremepapers.com/CIE/...AS Level/Mathematics (9709)/9709_w08_qp_3.pdf
Someone please help me with qn no. 6 (ii).. I'm unable to get the answer.
Thanks

 

[♫Prince Shah♫]

Still not started Mechanics 1.. So if i Start from today.. will i be able to complete it by 1st of may ?

 

[abruzzi]

http://papers.xtremepapers.com/CIE/...AS Level/Mathematics (9709)/9709_w08_qp_3.pdf
Could someone please help me with qn no. 6(ii)? I'm unable to solve it.
Thanks

 

[RadzMau]

Hi everybody
Can someone help me out with this Statistics 1 question:
An urn contains 5 red cubes and 4 white cubes. Three cubes are drawn in succession without replacement. What is the probability that
(a) the first two cubes are red and the third one white.
(b) two cubes are red, and one is white?
Answers: (a) 10/63 , (b) 10/21

 

[daredevil]

How to draw argand diagrams ?
i know the basic ideas of argand diagram , but how to draw some complex no,'s

give an example then i can tell u...
but here's an example to help you if it does.....
the vertical axis is a complex number, horizontal axis is real number.

 

[sitooon]

give an example then i can tell u...
but here's an example to help you if it does.....
the vertical axis is a complex number, horizontal axis is real number.

Thanks bro , but i now those basic things .. i meant when it comes in hard question for eg 5 Marks ,,, how to draw it ?
Does it have to be to scale,? or drawing it without scale ?

eg, 1- if said draw Z + 2 - 2i > 1
we will draw with radius one , but is the point ( 2 - 2i )
or ( 2i -2 ) because one of my friends told me arrange equation to make equation Z - ( ... )

 

[daredevil]

Thanks bro , but i now those basic things .. i meant when it comes in hard question for eg 5 Marks ,,, how to draw it ?
Does it have to be to scale,? or drawing it without scale ?

eg, 1- if said draw Z + 2 - 2i > 1
we will draw with radius one , but is the point ( 2 - 2i )
or ( 2i -2 ) because one of my friends told me arrange equation to make equation Z - ( ... )

ur friends waas right... u have to bring it to the form Z - (...)

so here u will plot a circle with a radius 1 and centre (-2+2i)

don't write (2i-2) ... Instead --> (-2+2i)
Otherwise it just confuses u when sitting in the examination hall. u might plot the imaginary coordinate on the x axis in a hurry if it's written as (2i-2)

 

[♫Prince Shah♫]

I appreciate your help >>> what about my question bro,
Does it have to be to scale >> do we have to draw it by ruler ?

second q : can you plz solve the question which i posted ?

daredevil is a Female

 

[TheZodiac]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w08_qp_3.pdf
Could someone please help me with qn no. 6(ii)? I'm unable to solve it.
Thanks

Hope it helps.

 

[TheZodiac]

How to draw argand diagrams ?
i know the basic ideas of argand diagram , but how to draw some complex no,'s

I've a file which is a complete guide on how to draw argand diagrams. I will upload it here soon, Insha'Allah.

 

[daredevil]

daredevil is a Female

thanks for clarifying it

and sitooon let's c if TheZodiac 's guide can help u and even ME!
if there's still a problem then we can solve that quesstion...?? bcz its complex and i dont want to get my hands dirty on that one just yet.... not in the mood
but if u still want me to do then DO TELL bcz i shud not shirk away from these questions and succumb to my laziness

so watever the case just holler ^_^

 

[♫Prince Shah♫]

I WANT TRIGO NOTES!

 

[TheZodiac]

thanks for clarifying it

and sitooon let's c if TheZodiac 's guide can help u and even ME!
if there's still a problem then we can solve that quesstion...?? bcz its complex and i dont want to get my hands dirty on that one just yet.... not in the mood
but if u still want me to do then DO TELL bcz i shud not shirk away from these questions and succumb to my laziness

so watever the case just holler ^_^

I am sorry, I didn't see that you already explained it. Whatever you wrote was correct and that's how argand diagrams are sketched. However, this guide is just for elaboration.

As Xtremepaper server isn't letting me upload the file in here, I've uploaded it on my dropbox account.
I hope this link works.
https://www.dropbox.com/s/9pdws1gqxo1b3yd/scan0007.pdf?m=

 

[daredevil]

I am sorry, I didn't see that you already explained it. Whatever you wrote was correct and that's how argand diagrams are sketched. However, this guide is just for elaboration.

As Xtremepaper server isn't letting me upload the file in here, I've uploaded it on my dropbox account.
I hope this link works.
https://www.dropbox.com/s/9pdws1gqxo1b3yd/scan0007.pdf?m=

dude that is like AWESOME!! (Y) (Y)
it's like all about argand diagrams in the most comprehensive manner i have yet seen!! Thankks a lottt man!!! If you have more this like that can you plz link me those tooo!! P3 is extremely difficult. You were a great help on this topic!!

sitooon I think all will be explained with this one. If you still have a problem then holler

 

[TheZodiac]

dude that is like AWESOME!! (Y) (Y)
it's like all about argand diagrams in the most comprehensive manner i have yet seen!! Thankks a lottt man!!! If you have more this like that can you plz link me those tooo!! P3 is extremely difficult. You were a great help on this topic!!

sitooon I think all will be explained with this one. If you still have a problem then holler

Glad I could help.
Insha'Allah I'll try to post more guides depending on the topic being asked. In return, do pray for me because I've LCAT exam tomorrow. Would be extremely grateful.

 

[daredevil]

Glad I could help.
Insha'Allah I'll try to post more guides depending on the topic being asked. In return, do pray for me because I've LCAT exam tomorrow. Would be extremely grateful.

Oohh Best of Luck !! (Y)
ummm can you just like send them without being asked...??? ^_^
and do you have such AWESOME material on any other subject??
I''ll send you mine too if you need any...

 

[TheZodiac]

Oohh Best of Luck !! (Y)
ummm can you just like send them without being asked...??? ^_^
and do you have such AWESOME material on any other subject??
I''ll send you mine too if you need any...

Sure thing. I will upload all the notes and stuff I have tomorrow. Right now I am studying for LCAT I hope it's okay?

 

[daredevil]

Sure thing. I will upload all the notes and stuff I have tomorrow. Right now I am studying for LCAT I hope it's okay?

yeahh yeah thats completely fine. Thankss...

Umm I had a question about the second last page from the notes you linked.. (screenshot attached)
(0,3) pe banana tha na hum ne.... this diagram is wrong... hai na? it is made on (0,-3) Just want to make sure...