not sure where this belongs but

i am trying to diferentiate a function and it is y=cosec^2 x + sin2x^2

now using the product rule u = cosec^2 x and v = son2x^2

so dv/dx = 4xcos2x^2

but WHAT IS THE DIFFERENTIAL OF COSEC ARRRRRRGGGHHHH

can anybody aid me in this

kyle

PMM
1 November 2006 11:32
2
Not at all, and thank you for making me ed hurt :haddock:

Errm duh…lol,
Sorry m8 absolutly not a clue…but out of curiosity… what is it?

edit… just to try and be helpfull… take a look at this… it may help…
Trigonometric function

drezha
1 November 2006 13:33
4
cosec differentiates to -cosec x . cot x

Does it use the product rule? I thought product rule would be if y=cosec^2.sin2x^2? (. = multiply if you didn’t know…)

Believe it’s similiar to differentiating a polynominal one.

so dy/dx = 2(-cosec.cot) + 4cos?

Ebuyer sell new keyboards for £1.99, a couple of you seem to have defective ones

Mojo
1 November 2006 14:18
6
Could be the lead, sometimes that generates gibberish if faulty…

apologies it is CHAIN rule,

and thanks so cosec —> -cosec x . cot x

tyvm now i can finally finsih the math work

:worship:

drezha
1 November 2006 20:26
9
Glad I could help.

Uni work is good for some things…

Egad
2 November 2006 08:07
10
I am so glad I don’t have to do that any more…

To be honest, I’m going to have to do some math review to follow some of that. So much for the math skills.

lol, then anwer to everything is 42 lol

yup.

Deep Thought (the second greatest computer ever built) spent Millennia calculating that the ultimate answer to the ultimate question of Life, the Universe and Everything is ‘42’

As this is totally useless unless you know the actual question, Deep Thought designed the Earth (the greatest computer ever built) as a living computer to calculate that very question.

The ultimate question is ‘what do you get if you multiply 9 by 6’.

so;

Q: What do you get if you multiply 9 by 6
A: 42

(and Mathematically it works!)

drezha
5 November 2006 19:51
15
4 multiplied by Cos of 2 x to the power of 2 over the cosec squared…

yes… that was my answer… don’t know where it came from… perhaps this bottle of whiskey?!

fenix25:

4xCOS2x^2 / cosec^2 ???

i believe you split it into qoutient rule and product rule hence 4cos2x squared over cosec squared is equivalent to

u = 4cos2x squared and v = cosec squared

vdu by dx = cosec squared . -4sin2x

udv by dx = 4cos2x . now cosec = 1/sin and dy by dx sin = cos so

udv by dx = 4cos2x . (sin squared)^-1 (-1 gets it 1 over)

so you get vdu by dx - udv by dx (stated above)

divided by cosec squared squared…cosec to the four hence

dy/dx of the above =

(cosec squared . -4sin2x) - (4cos2x . (sin squared)^-1
ALL OVER
Cosec to the power 4

ee walla

EDIT : lol just re read the post and i just did dy^2/dx so i differentated the answer lol, oh well it looks good so it stays

I can understand Differentials but only when filled with EP90

wolram
7 November 2006 23:30
19
I’m with TFW on that one :whiteflag:

I did? no no no… I only have my grade 12 math My girlfriend did that…