Question

integral sin(1/x) dx ?

Answer 1

xsin(1/x) - Ci(1/x) + C

Answer 2

what on earth?

Answer 3

you can't integrate this thing. where did the question come from?

Answer 4

http://www.wolframalpha.com/input/?i=integral+sin%281%2Fx%29

Answer 5

\[\int\limits 8x^2 \sin (1/10 x) dx\]

Answer 6

thats where the question came from

Answer 7

for the love of pete, wolfram doesn't give an answer! it gives the integral in terms of another integral.

Answer 8

\[8\int x^2\sin(\frac{1}{10}x)dx\] like that?

Answer 9

yes

Answer 10

so it is really
\[\sin(\frac{x}{10})\] not
\[\sin(\frac{1}{10x})\]

Answer 11

hahahahahah sorry

Answer 12

integrate by parts twice. pain in the butt, but if you want to use wolfram and follow the steps at least you will get a real answer this time

Answer 13

ok thanks

Answer 14

here you can look at this. but the basic idea is to integrate sin and differen
tiate x^2. then you will have to do it once more
http://www.wolframalpha.com/input/?i=integral+x^2sin%28x%2F%2810%29%29