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

/* code_begins */

{{{
x=var('x')
solve(exp(-ln(x))==1/x,x)
solve(exp(-ln(sec(x)))==cos(x),x)
}}}

/* code_ends */

 * '''Solution by''': 
   * Aashita Kesarwani, Student, IIT Roorkee
   * Praveen Kumar, Student, IIT Roorkee
   * Swati Ahuja, Student, IIT Roorkee