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

/* code_begins */

{{{
var('x,y,z,f1,f2,t')
f1 = y
u=diff(f1,y,1)
f2 = -x
v=diff(f2,x,1) 
integrate((v-u), (x,0,pi/4))
)}}}

/* code_ends */

 * '''Solution by''': 
   * sneha,student,pec
   * divya,student,pec