Question

Medal to the first right answer!!with soln..
Integral of {x^2/(xsinx+cosx)}dx

Answer 1

\[\int\limits_{?}^{?}{x^2}/(xsinx+cosx)\]

Answer 2

question?

Answer 3

here you go!!

Answer 4

that is too hard...

Answer 5

\[\int\limits_{?}^{?}{{x^2}/(xsinx+cosx)}dx\]

Answer 6

believe me I know

Answer 7

spent the whole day!!

Answer 8

@Preetha

Answer 9

@ParthKohli @dan815 @SolomonZelman

Answer 10

@Whitemonsterbunny17 @robtobey @.Sam.

Answer 11

@Compassionate

Answer 12

cmon guys @least give it a try!!

Answer 13

i got it :)

Answer 14

@SolomonZelman

Answer 15

wow..........how??

Answer 16

Either ur a genius OR ur wrong...

Answer 17

Shoot!!

Answer 18

i post it ok

Answer 19

pls do

Answer 20

uhhh im in advanced math and I have never done this...sorry

Answer 21

eait what grade you in

Answer 22

eat my grade??........did you solve it??

Answer 23

I am guessing no!!

Answer 24

dude or girl i need to known what grade your in or i cant help you

Answer 25

@kag @Owlfred @LiteNing1337 @Abhisar @skullpatrol @Secret-Ninja @Compassionate @demonchild99 @ganeshie8 @emmigrace222 @mathstudent55

Answer 26

what makes you think there exists a closed form for this ?

Answer 27

dont getcha!!

Answer 28

Is it solvable......I didnt check wolfram!!

Answer 29

cuz I solved a different but similar one!!

Answer 30

im not so sure if il able to work an integral that wolfram gave up :O

http://www.wolframalpha.com/input/?i=Integral+of+x%5E2%2F%28xsinx%2Bcosx%29+dx

Answer 31

\[\int\limits_{?}^{?}{ x^2/{(xsinx+cosx)^2}}\]

Answer 32

lol dude......anyways just wanted to make sure no one else can solve this!!

Answer 33

@Princer_Jones @perl

Answer 34

one sec

Answer 35

one sec

Answer 36

BTW The second one I posted is xtremely tricky....anyone wants the sol??

Answer 37

integral x^2 / ( xsin x + cosx) is not an elementary antiderivative

Answer 38

\[{xsecx.xcosx/{(xsinx+cosx)^2}}\]

Answer 39

you want the indefinite integral or the definite integral, i notice you have question marks in your limits

Answer 40

u have to do like this for the original question

Answer 41

indefinite

Answer 42

this was the original question
Integral of {x^2/(xsinx+cosx)}dx ?

Answer 43

ok you did sec x * cos x = 1 , i follow so far

Answer 44

yes...........the one I posted some comments bfore is another form of it which I solved

Answer 45

why is there suddenly a square term in the denominator?

Answer 46

in your original question there was no square term in the denominator

Answer 47

scroll up to your original integral

Answer 48

\[next xsex=f(x)(1st function) and (xsinx+cosx)=g(x)(2nd function) and then use ILATE\]

Answer 49

stop. look at your original integral above, there is no square term

Answer 50

yes
thats the reason I am not able to solve it

Answer 51

I solved a different version of the same question...

Answer 52

without the square term, it is unsolvable.
with the square term, it is solvable

Answer 53

k......closing the question .......m out!..................THANKS guys!!................Peace..\/

Answer 54

thats what I figured!!

Answer 55

you spent a whole day on an unsolvable integral.

here is one

integral sqrt(sinx) , good luck

Answer 56

I know this already

Answer 57

already wasted my time on this

Answer 58

the power if in the denominator is 2, then it is easily solvable... And it is not compulsory for every function to have a closed integral .. As easy an integral like integral of sin x/x dx is not possible to have a closed form. @cambrige