||'''Book'''|| Advanced Engineering Mathematics ||
 ||'''Author'''|| Erwin Kreyszig ||
 ||'''Edition'''|| 8th Edition ||

/* code_begins */

{{{
#2.13-1
x=var('x')
y=function('y',x)
de=diff(y,x,2)+4*y==15*sin(x)
desolve(de,y)
}}}

/* code_ends */

 * '''Solution by''': 
   *K B PATIL,Lecturer,SIGCOE K. K.NAVI MUMBAI.