anonymous
  • anonymous
can someone help me with matrices?
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
Hey Rld!
anonymous
  • anonymous
Like how do I find and inverse of a matrix using the product of elementary matrices
anonymous
  • anonymous
Hey mhp :D

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anonymous
  • anonymous
I need to find the inverse of a matrix using elementary matrices What doe sthat mean?
2bornot2b
  • 2bornot2b
The inverse of a given matrix is a matrix, which when multiplied with the given matrix gives identity.
amistre64
  • amistre64
there is something called a cofactor matrix, that is tranposed and then divided out by the determinate of the original
anonymous
  • anonymous
no I need to use the product of the elemntary matrices idk
amistre64
  • amistre64
youll have to define what that is
anonymous
  • anonymous
LOL It tells me to find the inverse of a amtrix using elementary matrices
anonymous
  • anonymous
What do u think that means?
anonymous
  • anonymous
if i copy from a book if AB=BA = I
anonymous
  • anonymous
theres more to it though
amistre64
  • amistre64
\begin{pmatrix}a&b&c\\e&f&g\\h&j&k\end{pmatrix} \begin{pmatrix}+|\begin{array}c f&g\\j&k\end{array}|\end{pmatrix} cant tell if that formats
anonymous
  • anonymous
can u guys plz help me with my question?
amistre64
  • amistre64
\[\begin{pmatrix}+|\begin{array}c f&g\\j&k\end{array}|& -|\begin{array}c e&g\\h&k\end{array}|& +|\begin{array}c e&f\\h&j\end{array}|\\ -|\begin{array}c b&c\\j&k\end{array}|& +|\begin{array}c a&c\\h&k\end{array}|& -|\begin{array}c a&b\\h&j\end{array}|\\ +|\begin{array}c b&c\\f&g\end{array}|& -|\begin{array}c a&c\\e&g\end{array}|& +|\begin{array}c a&b\\e&f\end{array}|\\ \end{pmatrix}^T\frac{1}{det}=inverse\] those sub matrixes are the determinants values of those things
amistre64
  • amistre64
dunno if its what its calling for tho :/
Zarkon
  • Zarkon
those are not elementary matrices
anonymous
  • anonymous
noooo they want something simple but obviously they didnt show an example and like i cant figure it out
Zarkon
  • Zarkon
here is an example ... http://stattrek.com/matrix-algebra/how-to-find-inverse.aspx
amistre64
  • amistre64
bummer, i memorized it for naught lol
anonymous
  • anonymous
Thanks amistre lol
amistre64
  • amistre64
isnt that the gauss jordon?
anonymous
  • anonymous
Ya s/t like that LOL
anonymous
  • anonymous
Zarkon that is what I needed
anonymous
  • anonymous
Thanks Guys :DDDD
anonymous
  • anonymous
ty zarkon
anonymous
  • anonymous
i didnt have to type the rst of the stuff
anonymous
  • anonymous
lol didnt forget abt yesterday mth. Do u still need help?
anonymous
  • anonymous
im just getting it from the book :P
anonymous
  • anonymous
hmmm correct me if i am wrong on a coordinate plane the sine and cosine waves to find their angle measurement would it just be the same same way as finding them in a regular circle then to find their line measure how to do that if it was just plot right in the middle of a coordinate plane
anonymous
  • anonymous
|dw:1327259052486:dw| This is how u wld draw it
anonymous
  • anonymous
this is a sin curve
anonymous
  • anonymous
now there is another thing of evaluating triangles like the degrees and measurements sohcahtoa
anonymous
  • anonymous
|dw:1327259201697:dw| have u ever seen this?
anonymous
  • anonymous
|dw:1327259258899:dw|
anonymous
  • anonymous
Do u know what I am talking abt?
anonymous
  • anonymous
umm sohcahtoa i know
anonymous
  • anonymous
ohhh so u r not referring to that
anonymous
  • anonymous
sin curve cosine curve i know
anonymous
  • anonymous
wait
anonymous
  • anonymous
ok i guess i am XD
anonymous
  • anonymous
i just have not seen the second to last drawing
anonymous
  • anonymous
oh it is abt cast
anonymous
  • anonymous
|dw:1327259558434:dw| these are the quadrants
anonymous
  • anonymous
In the first quadrant A=ALL is positive In the second quadrant S = Sin only sin is positive while verything else is negative In the third quadrant T= Tan only tan is positive In the fourth quadrant C=only cos is positive
anonymous
  • anonymous
This is referring to triangles in the coordinate plane. It all depends in which quadrant the triangle is in
anonymous
  • anonymous
ooo
anonymous
  • anonymous
I dont think that was clear
anonymous
  • anonymous
LOL I need to review my trig I learnt it so long ago
anonymous
  • anonymous
K I gotta go :((((( i am behind in my work
anonymous
  • anonymous
Too much work and little time I hope my prof will give me an extension. She aleady gave me one last week lOL
anonymous
  • anonymous
all i know about the coordinate plane is that quadrant 1 = y is +, x is + quad 2 = y is +, x is- quad 3 = y is - , x is - quad 4 = y is - , x is +
anonymous
  • anonymous
lol
anonymous
  • anonymous
you very lucky
anonymous
  • anonymous
bb
anonymous
  • anonymous
ty
anonymous
  • anonymous
LOL I didnt help u much
anonymous
  • anonymous
help is help i appreciate all i get
anonymous
  • anonymous
I wish i wld be able to help but i am so busy. i tutor and then I took on this subbing job
anonymous
  • anonymous
I AM SO BUSY I HATE IT. I WISH I HAD TIME FOR MYSELF
anonymous
  • anonymous
:P
anonymous
  • anonymous
U became so serious suddenly lol
anonymous
  • anonymous
lol
anonymous
  • anonymous
Its like u r a diff person
anonymous
  • anonymous
i like to make fun of life
anonymous
  • anonymous
never serious but it gets to the point :)
anonymous
  • anonymous
lol
anonymous
  • anonymous
besides where did you see me do such a thing ?
anonymous
  • anonymous
What be serious ??????? right now lol
anonymous
  • anonymous
hehe
anonymous
  • anonymous
no can do sawy
anonymous
  • anonymous
huh?
anonymous
  • anonymous
i dont know being serious is something i can do easily i dont know why
anonymous
  • anonymous
LOL hard to believe gonna get back to work
anonymous
  • anonymous
go go go
anonymous
  • anonymous
LOL I dont know how to leave os
anonymous
  • anonymous
i dont be the one to cause apocalyse
anonymous
  • anonymous
huh? what doe sthat mean?
anonymous
  • anonymous
apocalypse is kinda --end of the world
anonymous
  • anonymous
mth r u someone else?
anonymous
  • anonymous
im lazy to make another account and have a bad memory of pw
anonymous
  • anonymous
LOL the comp remembers it for u
anonymous
  • anonymous
I have a feeling that u r hero
anonymous
  • anonymous
LOL no response
anonymous
  • anonymous
i hate flipping pages to find the pw
anonymous
  • anonymous
then there is email account
anonymous
  • anonymous
then theres another account
anonymous
  • anonymous
this account
anonymous
  • anonymous
and that
anonymous
  • anonymous
ugg
anonymous
  • anonymous
It simpler than u think
anonymous
  • anonymous
U amy be hero lol
anonymous
  • anonymous
of course its easy but im lazy remember
anonymous
  • anonymous
R u hero?
anonymous
  • anonymous
nope
anonymous
  • anonymous
LOL u r acting like him lol
anonymous
  • anonymous
how does he act?
anonymous
  • anonymous
LOL not telling u
anonymous
  • anonymous
well hes typing now
anonymous
  • anonymous
so i dont see how i can be him/her
anonymous
  • anonymous
LOL OK
anonymous
  • anonymous
cutter10 question
anonymous
  • anonymous
^^
anonymous
  • anonymous
lol no
anonymous
  • anonymous
lol humor is fun
anonymous
  • anonymous
LOL
anonymous
  • anonymous
i have leeched an hour of you work time not that i want you to leave but i really want you to get your work done

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