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

/* code_begins */

# Solution 2 : page 483
# double integral in polar coordintes
var('r')
sin2 = sin(x)*sin(x)
rr = integral(r**3, r, 0, 1)
ss = integral(sin2, x, 0, pi/2)
Ix = ss*rr
print 'Ix : ', Ix

/* code_ends */

 * '''Solution by''': 
   * sanjeev , student, iiitH
   * mukund, student, iiitH