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Well do u wanna use u subsitution?
I don't really know. I tried to integrate by parts, but apparently it's wrong.. or I did it wrong.
well wrong according to what?
according to wolframalpha lol
u can get diff answers depending on the way u integrate but it is in reality all the sam answer
I think subsitution is easier
ohhh maybe not
Well, they put y=tanu and then they did something, but I don't understand it :/
ohh they used trig subsitution
but i guess u didnt learn that
ya that wld be the simplest
did u learn trig subsitution yet?
Nope, never learned it. this is for my DE class :(
lol that is weird
k give me a sec to figure it out
59% correct iguess
lol that is wrong
I am getting an ugly one
oh sal can u help?
ya but he never learnt that yet
is this for hmw? or you are just doing problems for fun?
yah, i read that.. but how does sec^3(tan^-1) = cos??
i have an exam tomoroww lol
ok I will show u what i got. u = 1+y^2 du=2ydy (1/2)du=ydy
so (1/2) integral (u)^-(2/3)(u-1)^(1/2)du
sorry i just dont know how to use latex
rld did you get a solution in the end using ur way?
ya but an ugly one
well look at the solution you know how y=tanu , the solution says that at the begining? you substitute y= tanu, then u=tan-1y
ya sal's method will give u a nice answer and it is the simplest
and \[\sin^2u+\cos^2u=1\] divide all by \[\cos^2u\] you will get, \[\tan^2u+1=\sec^2u\] you gotta know these identities
lol the guy disappeared
U scared him off
amma disappear too...
my screen frozed. i suppose i will mull it over. or just hope there will be no trig sub integrals.
pray hard :D
lol, yeh man just pray hard. go get some sleep so u can write the exam 2morrow
this might help ya linhong10
lol razor u r the best
cuz u r always so helpful
thax i love to help people even i dont know it.
by the way i alway help my friends
keep up the great work =)
rld u might be tired
hehe never tired
wow ur so patient i hope .
someday i might be like u
i mean a being very patient
cool free notes :D
ya sals notes
bye guyz wont see till friday okay
cya around later guyz the school has finally started