Mathematics: Post your doubts here!

[The Sarcastic Retard]

Can someone please explain Q10 part 3?

http://maxpapers.com/wp-content/uploads/2012/11/9709_s12_qp_32.pdf

https://www.xtremepapers.com/commun...st-your-doubts-here.9599/page-588#post-757954

 

[The Sarcastic Retard]

For s1 practice this paper: http://themathelp.com/pdf/a level s1.pdf
Kruthi

 

[TheJDOG]

Guys, make sure you clear your mechanics m2 doubts before the test

 

[asadalam]

The videos there are for clearing your basics and trick to crack tricky question patterns. Rest it depends on your knowledge of mathematics how you take the question. Keep practicing. You will score 9 on 9 easily in few days. ^_^
Good luck.

Hey man cant thank you enough for that video,even though it seemed simple it cleared up my basics and now i can easily solve most of the questions ^^

 

[asadalam]

For s1 practice this paper: http://themathelp.com/pdf/a level s1.pdf
Kruthi

We havent read about sampling distribution and this paper seems a bit different than the cie one

 

[The Sarcastic Retard]

We havent read about sampling distribution and this paper seems a bit different than the cie one

Practice the one u know. Questions will be asked similar to this pdf, as p1 practice paper pattern was same.

 

[Farhad221]

For s1 practice this paper: http://themathelp.com/pdf/a level s1.pdf
Kruthi

Do you know the answers to the paper if there are no answers can you tell me the answers you got after solving them so we can discuss.

 

[Manisha98]

i have just finsihed my igcses............. i would like to know if the syllabus for AS & A levels are the same ...........and wats the difference between AS & A levels syllabus...............is there something more or less in these two levels?? it would be really nice if u cld help me out .......thanks in advance

 

[nighthawk]

lol...AS is part of A level. AS and A2 makes A level. Its like you can give A level in two sittings. Or if you want you can give the complete A level together in one sitting, where you will appear both AS and A2. the syllabus is divided into two parts- AS and A2. Hope this answers your query.

Manisha98

 

[asadalam]

So hows stats prep people?​

 

[Manisha98]

lol...AS is part of A level. AS and A2 makes A level. Its like you can give A level in two sittings. Or if you want you can give the complete A level together in one sitting, where you will appear both AS and A2. the syllabus is divided into two parts- AS and A2. Hope this answers your query.

Manisha98

oooooh sure it does ....thanks for the explanation so much ...............bt do u knw any online learnign sites for maths ..........because i m plannign to write d as levels this oct nov session ........i would like to have ur help pls ............... thank u

 

[The Sarcastic Retard]

oooooh sure it does ....thanks for the explanation so much ...............bt do u knw any online learnign sites for maths ..........because i m plannign to write d as levels this oct nov session ........i would like to have ur help pls ............... thank u

http://www.examsolutions.net/maths-revision/syllabuses/CIE/period-1/specification.php

 

[asadalam]

Yar forums mai stats ki koi lift hi nai hai :/

 

[The Sarcastic Retard]

Yar forums mai stats ki koi lift hi nai hai :/

M1 > S1 I see. xD

 

[nighthawk]

oooooh sure it does ....thanks for the explanation so much ...............bt do u knw any online learnign sites for maths ..........because i m plannign to write d as levels this Oct-Nov session ........i would like to have ur help pls ............... thank u

Well giving AS this Oct-Nov......that is doable if you work hard. I hope you will be able to ace it. Well, I am not aware of online sites though. Well, you can inbox me any problems, I will try my best to help. And you can try this thread too.

https://www.xtremepapers.com/commun...15-post-your-problems-here.41477/#post-924035

 

[The Sarcastic Retard]

http://maxpapers.com/syllabus-materials/mathematics-9709-a-level/attachment/9709_w09_qp_12/
Q10 c why to do tan inverse?

 

[qwertypoiu]

http://maxpapers.com/syllabus-materials/mathematics-9709-a-level/attachment/9709_w09_qp_12/
Q10 c why to do tan inverse?

If you have two lines with known gradients and you wanna find the angle between them, this is the formula:

 

[The Sarcastic Retard]

If you have two lines with known gradients and you wanna find the angle between them, this is the formula:

My teacher neva taught me this.

 

[qwertypoiu]

My teacher neva taught me this.

Well you see the gradient of a line is rise over run, or increase in y over x, so in fact, gradient = tangent of angle with x-axis.


If the line in this pic has gradient m,
tan(theta) = m

So for any line with a known gradient, the angle it makes with the x-axis can be found by:
Theta = tan^-1(m)

So really, you don't need the formula. If there are two lines and you wanna find the angle between them, find the angle each of them makes with the x-axis, and find the difference. This will give you the correct answer. We may write a formula like this:

Angle = tan^-1(m1) - tan^-1(m2)

In fact from this formula you can derive the one I showed you. Take tan on both sides,
Tan(angle) = tan[ tan^-1(m1) - tan^-1(m2) ]
Using addition rule for tan (learnt in A2 I think) :
Tan(angle) = { tan(tan^-1(m1)) - tan(tan^-1(m2)) } / { 1 + tan(tan^-1(m1)) * tan(tan^-1(m2)) }
Tan(angle) = (m1 - m2) / (1 + m1*m2)


Oh while typing this I found the website with the pic I sent you it has good explanation:

http://www.slideshare.net/mobile/SimonBorgert/angle-between-2-lines

 

[phanttasy]

Need help on this question.


At a particular point of a curve y=5x^2 -12x +1 the equation of the normal is x +18y +c=0. Find the value of constant c.