The Official Homework Help Thread

[Major]

Simple maths help needed here

14530 = 17325 sin Q

answer should be 123, which i'm not getting... If you get this answer, tell me how

 

[96NotOut]

Simple maths help needed here

14530 = 17325 sin Q

answer should be 123, which i'm not getting... If you get this answer, tell me how

Are you getting 57? That's right too.

(Sin 123) is the same as (sin [180-123]), which is (sin 57).

 

[Afridi96]

14530 = 17325 Sin Q
14530/17325 = Sin Q
Q = Sin inverse (14530/17325)
Q = 57
As Sin x = Sin (180 - x)
Sin 57 = Sin (180 - 57)
Therefore Q = 123 as well.

 

[Pakistani_Legend]

14530 = 17325 Sin Q
14530/17325 = Sin Q
Q = Sin inverse (14530/17325)
Q = 57
As Sin x = Sin (180 - x)
Sin 57 = Sin (180 - 57)
Therefore Q = 123 as well.

You did this question just because of your argument with 96NotOut in the other thread.

 

[Afridi96]

You did this question just because of your argument with 96NotOut in the other thread.

Now i've done 2 of Major's Maths problems, i'm trying to reach 96*'s IQ level

 

[Pakistani_Legend]

Now i've done 2 of Major's Maths problems, i'm trying to reach 96*'s IQ level

Alright.

 

[Afridi96]

Time to try and do a past paper now, if i need help on a question i'll be sure to post it here

 

[96NotOut]

Time to try and do a past paper now, if i need help on a question i'll be sure to post it here

I did 3 in the time I didn't post.

You can't be as smart as me in a million gazillion years.

 

[Afridi96]

I did 3 in the time I didn't post.

You can't be as smart as me in a million gazillion years.

I'm still in the middle of doing my first one On question 4 already B)

True true can you help me how do you integrate 3x + 5

 

[Donal Cozzie]

I before e except after c.

Thatll be 5 euros please...

 

[Donal Cozzie]

I'm still in the middle of doing my first one On question 4 already B)

True true can you help me how do you integrate 3x + 5

Nevermind im wrong

 

[Afridi96]

Nevermind im wrong

Lool excellent

 

[Donal Cozzie]

Lool excellent

I differentiated by mistake

 

[Afridi96]

I differentiated by mistake

I didn't get that I before e part?

 

[96NotOut]

I'm still in the middle of doing my first one On question 4 already B)

True true can you help me how do you integrate 3x + 5

I'm just a kid...!

On a more serious note, what is that and how do you do it?

 

[hamzie]

I'm still in the middle of doing my first one On question 4 already B)

True true can you help me how do you integrate 3x + 5

(3x^2)/2 + 5x

Add a power to the x, in this case x^1+1 .. the new power you get .. i.e. 2 will be the denominator too.

 

[Afridi96]

I'm just a kid...!

On a more serious note, what is that and how do you do it?

Ohh i posted an easy one, i guess in Pakistan they start school 1 year later? If you were in the UK you would be doing your first year of A-Levels right now (unless you turn 18 before September then you'd be in your 2nd year).

You just increase the power by 1 then divide by the new power as Hamzie explained

(3x^2)/2 + 5x

Add a power to the x, in this case x^1+1 .. the new power you get .. i.e. 2 will be the denominator too.

Thanks

 

[hamzie]

Oh lawd now you guys help me

How do you differentiate between a C8-T1 lesion and an ulna nerve lesion

 

[96NotOut]

Ohh i posted an easy one, i guess in Pakistan they start school 1 year later? If you were in the UK you would be doing your first year of A-Levels right now (unless you turn 18 before September then you'd be in your 2nd year).

You just increase the power by 1 then divide by the new power as Hamzie explained

I turned 17 less than a month ago.

And I started school in the US.

I'll go try it now.

 

[Donal Cozzie]

I didn't get that I before e part?

Its a rule in English you learn when you're about 6. Helps you spell words like believe deceive lol

 

[Afridi96]

Oh lawd now you guys help me

How do you differentiate between a C8-T1 lesion and an ulna nerve lesion

I'm guessing that's Biology ?

I turned 17 less than a month ago.

And I started school in the US.

I'll go try it now.

Oh so you would have started A-Levels, you're gonna try the question? So you haven't learn Integration/Differentiation yet? (I think it comes under Calculus).

 

[Afridi96]

Its a rule in English you learn when you're about 6. Helps you spell words like believe deceive lol

Ohh lool yh i've heard it, I thought you meant something to do with integration when you get the constant + C

 

[Donal Cozzie]

you guys want to try some honours maths???

http://www.examinations.ie/archive/exampapers/2013/LC003ALP100EV.pdf

http://www.examinations.ie/archive/exampapers/2013/LC003ALP230EV.pdf

When i did my exams last year i got a C2 (between 60-65 percent which i was very happy with!). The links above are the exam i sat. Feel free to take a quick look at the standards of the irish education system lol (this is the final exam you sit before going onto college).

I can supply the answers if, god forbid, any of you actually decide to try any of them lol

 

[Afridi96]

you guys want to try some honours maths???

http://www.examinations.ie/archive/exampapers/2013/LC003ALP100EV.pdf

http://www.examinations.ie/archive/exampapers/2013/LC003ALP230EV.pdf

When i did my exams last year i got a C2 (between 60-65 percent which i was very happy with!). The links above are the exam i sat. Feel free to take a quick look at the standards of the irish education system lol (this is the final exam you sit before going onto college).

I can supply the answers if, god forbid, any of you actually decide to try any of them lol

Before starting A-Levels you do that? . Wow 300 marks is way too long! I always hated De Moivre (mainly because the teacher that taught it to me couldn't really teach ) but i'm self-teaching myself some topics from ExamSolutions.

 

[Donal Cozzie]

Before starting A-Levels you do that? . Wow 300 marks is way too long! I always hated De Moivre (mainly because the teacher that taught it to me couldn't really teach ) but i'm self-teaching myself some topics from ExamSolutions.

Its actually 600 marks. Each paper is worth 300 lol.The two combined give you your result.

Well we have 8 years in primary school (age 5-12/13) and 5 years in secondary (12/13-17/18). The exam i showed you is the Leaving Cert which determines what college offers you will get. I dont know much about other education systems (e.g. i dunno what A-Levels are) but i know our one is seen as quite good (i know some indians who moved here just for the education lol).

 

[Afridi96]

Its actually 600 marks. Each paper is worth 300 lol.The two combined give you your result.

Well we have 8 years in primary school (age 5-12/13) and 5 years in secondary (12/13-17/18). The exam i showed you is the Leaving Cert which determines what college offers you will get. I dont know much about other education systems (e.g. i dunno what A-Levels are) but i know our one is seen as quite good (i know some indians who moved here just for the education lol).

Ohhh, yh over here our college years are 16-18. So that's alright but it's way too long 600 marks And yh some people do come here for the education.

 

[Major]

could someone do derivation of these for me. have to find gradient


√(1 + 4x)


do step by step......

 

[Major]

2
-------------
√1+4x

is my answer

 

[Major]

new question...

how will i solve this

0=  2
   ---
   √1+4x

 

[Major]

i know i could take the denominator to the underway, but how ma i suppose to remove the underroot

 

[Afridi96]

2
-------------
√1+4x

is my answer

Yh that's right did you do it by inspection?

 

[Major]

Yh that's right did you do it by inspection?

didi it by some derivation rule which i had noted down. could you plz do the next one for mee plzzz

 

[Afridi96]

new question...

how will i solve this

0=  2
   ---
   √1+4x

Sorry but 2 divide by anything won't give you 0...

didi it by some derivation rule which i had noted down. could you plz do the next one for mee plzzz

Oh fair enough

 

[Major]

Sorry but 2 divide by anything won't give you 0...


Oh fair enough

lol.. ok

What i suppose to do is find the gradient... Now do i don't have value of X nor Y, how am i suppose the find the gradient, that would be used in the equation of normal formula

 

[Afridi96]

lol.. ok

What i suppose to do is find the gradient... Now do i don't have value of X nor Y, how am i suppose the find the gradient, that would be used in the equation of normal formula

Could you post the full question here plz?

 

[Major]

let me try

 

[Major]

Here

 

[Major]

sorry yar, uploaded from phone, its the first question

 

[Afridi96]

Achaaaa i see what you did wrong, 1 sec lemme just get a pen and paper so i can write it out

 

[Afridi96]

Sorry i kept making a silly mistake

So you want to find the normal to the curve at B. At B we can see x = 0, so you plug that into your equation and you get y = 1. As you correctly differentiated it, you plug you x value (x=0) into your differential equation and you get your gradient = 2, so the gradient of the normal = -0.5.

So y - 1 = -0.5 (x - 0)
y - 1 = -0.5x
y +0.5x -1 = 0
y +0.5x = 1
(Times both sides by 2) Therefore 2y + x = 2

 

[Major]

how is y=1

 

[Major]

nvm got it.. thx broo


SO if i write

y-0.5x=1 its still correct right?

 

[Afridi96]

nvm got it.. thx broo


SO if i write

y-0.5x=1 its still correct right?

Yes you can write y + 0.5x = 1 (normally if they want you to write it in a specific form they would tell you).

Np

 

[Major]

are you ready for another question ?

 

[Major]

now the answer that i'm getting for my next question is

derivation=
18
------
(2x+3)^2

Equation of tangent
9y-2x=-5 (the actual answer on paper is 9y+2x=15)

 

[Donal Cozzie]

You either have the largest book of all time or the smallest phone

 

[Major]

You either have the largest book of all time or the smallest phone

uploading from phone to PP on browser PP.... thats why its all messed up...

While you here, do the above math question

 

[Afridi96]

What did you get for your gradient ?

 

[Major]

i just placed x= 3 so gradient was

2
--
9

was gradient

 

[Afridi96]

(Excuse the handwriting)

 

[Pakistani_Legend]

(Excuse the handwriting)

We will, surely.:adnan

 

[Afridi96]

Lool, my handwriting is terrible but as long as the examiners can read it, it doesn't matter

 

[96NotOut]

I was going to criticize it, but then I saw your teeny note.

 

[Pakistani_Legend]

I was going to criticize it, but then I saw your teeny note.

Spot on.

 

[Pakistani_Legend]

Lool, my handwriting is terrible but as long as the examiners can read it, it doesn't matter

The same excuse is used by the students in my class who have bad handwriting.

It is an embarrassing situation for them when our teachers asks, "who wrote the notes with his feet?".

 

[96NotOut]

I can't stand bad writing, I feel sorry for the examiners who actually have to read all that. It can hurt you too, a kid in my class got a C in one of his CIEs because of his scrawl.

 

[Afridi96]

I was going to criticize it, but then I saw your teeny note.

The same excuse is used by the students in my class who have bad handwriting.

It is an embarrassing situation for them when our teachers asks, "who wrote the notes with his feet?".

Oh well, if the examiners can read it i don't see the problem . In one history i got 97% even though it was all essay based, so i guess the examiner understood .

 

[Afridi96]

I can't stand bad writing, I feel sorry for the examiners who actually have to read all that. It can hurt you too, a kid in my class got a C in one of his CIEs because of his scrawl.

There was this guy in my class who got most things right bot got a U because the examiner couldn't read his handwriting . He had a scribe for his next exam.

 

[96NotOut]

There was this guy in my class who got most things right bot got a U because the examiner couldn't read his handwriting . He had a scribe for his next exam.

Lolwut? A scribe? No kidding?

 

[Pakistani_Legend]

There was this guy in my class who got most things right bot got a U because the examiner couldn't read his handwriting . He had a scribe for his next exam.

He should have sued the teacher. It is the teacher's problem that she can't read, not the student's. The teacher has to learn how to read, and then become a teacher.

 

[Afridi96]

Lolwut? A scribe? No kidding?

He should have sued the teacher. It is the teacher's problem that she can't read, not the student's. The teacher has to learn how to read, and then become a teacher.

Yh, peak on him though, he got to retake it though. It's not the teachers fault, the examiners mark it.

 

[Major]

guys help needed

IN coordinate Geomatry there is a formula for calculating triangle area


What is that formula

its something like this

1/2|y1 y2 y3 y1|
| x1 x2x3 x1|

the y1 multiplies with the x2 diagnoly.....

i dont know the proper formula.. help needed

 

[96NotOut]

Dude, you really need to get a math tutor.

 

[Mamoon]

Area of triangle is B.H/2

B = Base
H = Height
. = multiply

 

[96NotOut]

Is this the formula you're looking for?

Area = {[Ax (By-Cy)] + [Bx (Cy-Ay)] + [Cx (Ay-By)]} / 2

For a triangle with vertices ABC. Ax is the x-coordinate of A, Ay is the y-coordinate of A and so on and so forth.

 

[Mamoon]

My hand writing is beautiful which is very rare for a doctor.

 

[Mamoon]

Blimey, which formula is that and when is it used?

Pardon my ignorance, haven't done math since I gave my O Levels in 2008.

 

[96NotOut]

I came across it when I was preparing for my mocks, looked it up on the Internet again.

 

[96NotOut]

I'm not sure if its right or of much help. :/

 

[Mamoon]

Too many pedestrian mathematicians on this forum.

 

[Mamoon]

What did you get for your gradient ?

Never call the slope, "gradient".

 

[96NotOut]

Pedestrian mathematician?

 

[Mamoon]

Matlab fazul mathematicians.

 

[96NotOut]

Thanks. Credit to my fazul teachers.

I've never had a decent math teacher in my life, I teach myself.

 

[Mamoon]

Math is so overrated.

 

[HamzaSaeen]

I really don't know why people find math hard.

 

[96NotOut]

What subject are you worst at?

 

[96NotOut]

Math is so overrated.

Still beats biology by a thousand miles.

 

[Mamoon]

Biology is awesome.

 

[96NotOut]

Yuck. It's boooring and sucks.