||'''Book'''|| Linear Algebra ||
 ||'''Author'''|| Gilbert Strang ||
 ||'''Edition'''||  ||

/* code_begins */
q=matrix([[cos(x),-sin(x)],[sin(x),cos(x)]])
var('w')
w=q.transpose()
var('w1')
w1=q.inverse()
bool(w)==bool(w1)


/* code_ends */

 * '''Solution by''': 
   * <guna>, <student>, <snist>