I'm an IGCSE Maths Teacher - Post your questions here.

[notnek01]

If anyone wants last minute revision notes/questions/answers for all topics, please email me at [email protected]

And good luck to anyone taking Paper 2 tomorrow

 

[james1234]

a)

First notice that the base is square so AC = DB.

Look at right-angled triangle ABC and use Pythagoras to find AC. And this is equal to DB.

Next MB = 1/2 DB.

Now look at the right-angled triangle MPB. You can use Pythagoras to find PB.


b)

Can you do this part now? You need to use trigonometry (sohcahtoa) methods to find the angle PBM.

Alright! Got it

 

[xpfaddict]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s11_qp_23.pdf
question 17 b

 

[notnek01]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s11_qp_23.pdf
question 17 b

I answered this question in the other thread.

Please try to only post your question once or it gets confusing

 

[Jefri..]

May/June 2012 0581/22
Q 19 both a and b

 

[notnek01]

May/June 2012 0581/22
Q 19 both a and b

A matrix has no inverse if it's determinant is 0.

The (2x2) identity matrix has first row (1,0) and second row (0,1).

 

[Jefri..]

t

A matrix has no inverse if it's determinant is 0.

The (2x2) identity matrix has first row (1,0) and second row (0,1).

Thanks

 

[AmazynGal]

how to find the value of x and y http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w06_qp_2.pdf question 19 b

 

[notnek01]

how to find the value of x and y http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w06_qp_2.pdf question 19 b

Row 1 into column 1: 7*x = 7x = 28
Row 1 into column 2: 7*y = 7y = 42.

Does this make sense? I can't explain how to multiply matrices on a forum so if you're still stuck, can you explain why fully?

 

[AmazynGal]

Row 1 into column 1: 7*x = 7x = 28
Row 1 into column 2: 7*y = 7y = 42.

Does this make sense? I can't explain how to multiply matrices on a forum so if you're still stuck, can you explain why fully?

well kinda , i mean how can i get the values?? and multiply them i solved the first part as 7*x=7x and the other 3*y=3y and i added them and then i wanna find the value for both but i dont know how ;/ is the way i did wrong??

 

[notnek01]

well kinda , i mean how can i get the values?? and multiply them i solved the first part as 7*x=7x and the other 3*y=3y and i added them and then i wanna find the value for both but i dont know how ;/ is the way i did wrong??

It's hard to understand what you've done and it's also hard to explain matrix multiplication on here, as I said before.

Can you show me how you would multiply the row matrix (7, 3) and the column matrix (1, 2)?

This is just an example so I can check that you know how to multiply matrices like these.

 

[AmazynGal]

It's hard to understand what you've done and it's also hard to explain matrix multiplication on here, as I said before.

Can you show me how you would multiply the row matrix (7, 3) and the column matrix (1, 2)?

This is just an example so I can check that you know how to multiply matrices like these.

yea i know how to do that its like 7*1 + 7*2 ,,

 

[notnek01]

yea i know how to do that its like 7*1 + 7*2 ,,

Sorry, I meant the column matrix (7, 3) and the row matrix (1, 2).

 

[notnek01]

My internet is not working very well so I probably won't be able to answer anymore questions today.

 

[xpfaddict]

what is radical and index form??

 

[notnek01]

what is radical and index form??

Radical form means that you leave your answer in terms of a square root e.g. root(2) or 3*root(5)

Index form means that you leave your answer as a power e.g. 2^5 or x^n

 

[james1234]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s11_qp_23.pdf 17(b) how do u solve it? and for the map sizes and actual size and stuff .. What formula is used?

 

[sweet.sugar]

Can u plz solve Q7,c and d of oct/nov/10 v42

 

[notnek01]

I won't be able to answer any questions today. But I will answer every question tomorrow.

 

[GorgeousEyes]

I won't be able to answer any questions today. But I will answer every question tomorrow.

I like how u help people . God bless u