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

/* code_begins */

{{{
a=matrix([[cos x,sin x],[-sin x,cos x]])
print a
b=det(a)
print b
}}}

/* code_ends */

 * '''Solution by''': 
   *k.sivalata,student,pec
    srija.n,student,pec
    triveni.k,student,pec