Differential equation help needed

http://latex.codecogs.com/examples/9...2b42ee6a23.gif

find the solution that fulfills http://latex.codecogs.com/examples/4...d88f23de24.gif

please help me and let me know the steps cause i didnt come far

what i did so far

http://www.pluggakuten.se/mathsymbol...93eecc0876.gif

then the left side is

http://www.pluggakuten.se/mathsymbol...ec4e015448.gif

then i got stuck with this...

http://www.pluggakuten.se/mathsymbol...a0a5363843.gif

now what?

anyone able to help? so i can finish this one since it doesnt seem to be much left

nvm


http://www.pluggakuten.se/mathsymbol...c5155586e6.gif

then substistute with x=pi and y=0 and divide both with x^2

http://latex.codecogs.com/examples/a...1163a4579f.gif

http://latex.codecogs.com/examples/a...1a325cb287.gif

sin(pi)=0

0=C/pi^2

C=0*pi^2

C=0


if anyone can just confirm that this is right i would appriciate it