Mathematics: Post your doubts here!

[Saad the Paki]

View attachment 60058
can anyone plzz help me with this qtn

Haha this question was asked before as well, no one managed to do it.
Hopefully someone is successful this time
Oh and this is the maths thread so you should ask this in the physics thread

 

[mohmed ahmed soliman]

NO offence but the sort of questions you're asking are very basic which means you haven't quite understood the concept. So you need to do that first before doing past papers

ok i know that i am not very good in s1 and there is no time for revision now its time for pastpapers and so
may u help me in any of the posts

 

[mohmed ahmed soliman]

S1 and believe me, my paper was 98% correct, and I did it in almost 1 hour

may u help me in any of the posts

 

[qwertypoiu]

Oh alright.

So we have to ignore the 4 that is being multiplied with cos^2x and the other function.

Yes. Even if you don't ignore the 4 you will get rid of it by dividing 4 on both sides and 0/4 is still 0. The other function was in terms of y so I decided to ignore it.

 

[Anny Mazhar]

Has anybody given International Mathematics Paper 6? Urgent help required!!!

 

[awesomaholic101]

Has anybody given International Mathematics Paper 6? Urgent help required!!!

Stats?

 

[Copy Cat]

 

[Eugene99]

View attachment 60051 View attachment 60052 HELP IN III

The signs in the solution are quite difficult to type, so I did it handwritten, here you go

 

[Anny Mazhar]

Stats?

Dunno anything. It's 0607/62. Its giving me nightmares!

 

[awesomaholic101]

Dunno anything. It's 0607/62. Its giving me nightmares!

Have you got a teacher? S1 is pretty easy once you get the hang of it.
Wait don't tell me you're taking the exam this m/j?

 

[Anny Mazhar]

Have you got a teacher? S1 is pretty easy once you get the hang of it.
Wait don't tell me you're taking the exam this m/j?

Yes this M/J. No teacher, no tuition. Im almost prepared for paper 2 and paper 4, but paper 6 is killing me!

 

[Shah34]

Aoa can anyone solve the last part , plus also explain the concept thanks.

 

[Rizwan Javed]

Have you got a teacher? S1 is pretty easy once you get the hang of it.
Wait don't tell me you're taking the exam this m/j?

Lol. xD I think she's talking about igcse international mathematics

 

[awesomaholic101]

Lol. xD I think she's talking about igcse international mathematics

As far as I remember, we had only 2 papers in IG math ... right?

Im almost prepared for paper 2 and paper 4, but paper 6 is killing me!

 

[Rizwan Javed]

As far as I remember, we had only 2 papers in IG math ... right?

International Mathematics is a totally different subject. You're talking about Mathematics only. International Mathematics is a different.

 

[Anny Mazhar]

Lol. xD I think she's talking about igcse international mathematics

Yeah IGCSE. I think I posted on the wrong thread lol

 

[Anny Mazhar]

As far as I remember, we had only 2 papers in IG math ... right?

No it's three papers, either of core or extended.

 

[farhan141]

Yes. Even if you don't ignore the 4 you will get rid of it by dividing 4 on both sides and 0/4 is still 0. The other function was in terms of y so I decided to ignore it.

Alright thanks. Can u look at the other questions i posted

 

[Maayee]

http://papers.gceguide.com/A Levels/Mathematics (9709)/9709_s14_qp_41.pdf
Can anyone help me with question 5 pls

 

[unhellty]

Referred to the origin O, the points A, B and C have position vectors given by
−−→ OA = i + 2j + 3k, −−→ OB = 2i + 4j + k and −−→ OC = 3i + 5j − 3k.
(i) Find the exact value of the cosine of angle BAC. [4]
(ii) Hence find the exact value of the area of triangle ABC. [3]
(iii) Find the equation of the plane which is parallel to the y-axis and contains the line through B and C. Give your answer in the form ax + by + cÏ = d. [5]

Please help me with (ii), how do I get the sin of the angle sqrt41/21 as referred to mark scheme? My friend told me to use A^2=B^2+C^2, but how can we know if triangle ABC is a right-angled triangle? Is there any other way to solve this besides my friends method and sine rule?

ASAP. Thanks!!