diff ( y2 , x , 1 ) = diff ( y1, x , 1) ; diff ( y1 , x , 1 ) = sin ( x ) ; ! Digits := 32; max_terms := 30; ! x_start := 0.1; x_end := 5.0; diff(y1,0,exact_soln_y1(x_start)); diff(y2,0,exact_soln_y2(x_start)); glob_h := 0.00001 ; glob_max_iter := 20; ! exact_soln_y1 := proc(x) 2.0 - cos(x); end; exact_soln_y2 := proc(x) 2.0 - cos(x); end;