Maths, Addmaths and Statistics: Post your doubts here!

[Haris Bin Zahid]

Hi... You can earn online during your summer vacations
read the blog
iearnvillage.blogspot.com

When u are young, work to learn not to earn.

 

[Dukeofwin]

b-i) CBD=15 (alternate angle). BCD= 180-(90+15)=75. Now apply Sine Rule.
ii)(1/2)*200*250*sin30
iii)Diameter=450
Radius=450/2=225
Kindly check the answers whether they are right or wrong.

Yup, all answers are spot on

extend the line C so the angle it form would be 90name this point "y" and and <c=15 so now apply equation 90+15+x=180

for it(ii) part i have a long method

first find lenght BY by sine ration a/sinA=b/sinB => 250/sin90= bc/sin15

this way you could find BY ..now find CY by same method sine ratio ...now for SY = SB-BY

by this you would have SY and CY now simply apply pythagorus theorem for SC

hope you got cleared !!

Thanks a ton!

 

[khizer shahab]

10 (a)
(i)it will be 90-15=75 degrees, coz if u complete the dotted line till u get till SB(mark it as point X), you will se it will be a right angled triangle.
(ii) find SC using cosine formula.
(iii) use sin-1(3oo/SC)

oh I forgot about cosine rule yeh its better to use ,, I applied a really long method !!!

 

[faira]

how can we determine how many lines of symmetry does a figure have?
is there any relation b.w. order of rotational sym n lines of sym?

 

[Haris Bin Zahid]

Yup, all answers are spot on

Thanks a ton!

No problem mate. I'm free these days!

 

[Dukeofwin]

No problem mate. I'm free these days!

Still using XPF?
I understand how difficult it is for you to pass time!....
XPF in vacations is like drinking cold coffee is winters!

 

[AlphaBeta]

Yeah...but use it very rarely these days.
Hehe....not really difficult to pass time. Here's what I do in summer vacations:

tell me ways to use cal efficiently

 

[syed1995]

oh I forgot about cosine rule yeh its better to use ,, I applied a really long method !!!

you're doing the same question i did an hour ago ..

 

[AlphaBeta]

you're doing the same question i did an hour ago ..

tell me some calculator shortcuts bro

 

[syed1995]

tell me some calculator shortcuts bro

there are no shortcuts. And even if they were there, you cannot learn them in a day! Focus on the Topics which are coming in tomorrow's exams rather than wasting time trying to learn short cuts on your calculator.

 

[AlphaBeta]

then tell me topics which are likely to come as u did add maths u might give a guess?

 

[syed1995]

then tell me topics which are likely to come as u did add maths u might give a guess?

http://www.xtremepapers.com/communi...st-your-doubts-here.4773/page-188#post-321616

 

[AlphaBeta]

thanks a lot

 

[Haris Bin Zahid]

tell me some calculator shortcuts bro

I have many....but depends on the calculator model you're using.

 

[AlphaBeta]

I have many....but depends on the calculator model you're using.

have 100 ms and another one tell me will u?

 

[Vogue]

to go more simpler, this could be like this:
at first picking, we could get any one of the five numbers,right? so probability at stage 1 is 5/5 =1
at second stage, we will have to pick only one number out of 5, to keep it the same as before, so probability is 1/5
at the third stage, we can again pick only one number, so probability is again 1/5
multiplying the three, we get 1* 1/5 * 1/5 = 1/25
that is how we did permutations and combinations in addmaths, right syed1995?

thanks a lot!!!!!!!

 

[HarisLatif]

we solved that a couple pages back right ?

yeah

 

[pakiboy]

i wrote 4/10 and 2/5

me 2 wrote same..............

 

[A star]

same

 

[pakiboy]

This is a past examination question about frequency polygon + er and ms. It doesnt ask anything about touching the axis:
View attachment 12206

can u plz attach the marking scheme and this is frm which year??????????/