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

/* code_begins */

{{{
a0,an,bn,n,k =var('a0,an,bn,n,k')
# f(x) is even
a0=1/(pi)*(integral(k,x,-pi/2,pi/2))
print 'a0=',a0
an=integral(k*cos(n*x),x,-pi/2,pi/2)*2/pi
print 'an=',an
}}}

/* code_ends */

 * '''Solution by''': 
   * Snehal Mitragotri, Ex-student, IIT Roorkee
   * Aashita Kesarwani, Student, IIT Roorkee
   * Tale PrafullKumar, Student, IIT Roorkee