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i have a feeling cosh is involved here
x-2 = coshu?
is that trig identity right?
are u sure its not sinh - cosh right
1+sinh = cosh it has to be right ..i think
ah of course!! thank you!
now just convert dx into du
hold on did i make a mistake somewher -.- this simplfies too welll
ok there we go now its fixed
ah i was thinking that- isn't it 2 though?
that is arccosh
oh hmm lemme chekc again i got root 2 from here
oh no sorry it is
i lost my root - ok i think im there...
ok got it!! thanks :) any idea why there's a root 2 at the beginning or is it just something to remember?
we solved it
:D you solved it
we want this expression right from here|dw:1371049787270:dw|
so its gotta be root2 sothat when u square it will be 2
and now u know everything
its just tweaking so u get the expression u can use
riight i see! what i'm kind of seeing is that there's no right or wrong substitution its just the one that works in the end
which is just what you said :P
everything starts from this nice identity cosh^2-sinh^2=1 or other way i cant remember
frrom here we just tweak it
really the only difference between hyperbolic and non hyperbolic in the ones we've been doing is that it changes the cos^2+sin^2 identity
is this highschool?
further maths a level so yup
u are pretty smart for highschool kid
what is further maths a level
aw thanks :) i guess you're not from uk then? a levels are just before university
oh ok, yeah I am in Canada
ah cool :) and i'm really not, my exam is next week, gunna fail :P are u a teacher or anything?
no lol just a lowly university students xD
lol! what year of uni?
so that makes u like 19?
ur pretty smart too!
lol well math is kinda grinded down into you for engineering
its the only course everyone does good in engineering.. everything else just drains you haha
But i am really starting to like math!! it gets fun once you get into a lot of integration... you can finally see what u learnt all this math for
oh dear :P i can imagine though, i'm gonna be doing just maths in uni, everything else drains me aswell
yeah it gets more interesting the higher you go really
i am Enginering physics student, so i am trying to get really good at Math, then physics is pretty fun!! all the electricity stuff, i just wanna be able to learn theory and not worry about the math part, so im really trying to brush up my math before 2nd year starts
how do you get into university in UK.. do u need to write some "SAT" equivalent there
yeah thats a really good idea ! and you just need grades from 3 a level courses and a personal statement
i watch some videos on youtube from this woman who taught at mit
not mit.. cambridge
shes a really good math teacher!
and u u can watch MIT math lectures on youtube.. those are really good too
theyre the best teachers, u shud watch em.. very hard to find good teachers for this stuff
and patricKJMT and khanacademy ofcourse
oh yeah i think i've heard of some of them! i think i will use them a bit more, feel like we havent been taught anything
our teachers just gave us printed off notes and read through them with us
i remember those highschool days...!! just wait till u get to university.. u will know all these ppl i mentioned
almost everyone in university knows them
from all over the world xD