diff ( y2 , x , 3 ) = m1 * cos(x) ; diff ( y1 , x , 1 ) = m1 * y2; ! Digits := 32; max_terms := 30; ! x_start := 0.1; x_end := 5.0; glob_h := 0.00001; array_y1_init[1] := exact_soln_y1(x_start); array_y2_init[1] := exact_soln_y2(x_start); array_y2_init[2] := exact_soln_y2p(x_start); array_y2_init[3] := exact_soln_y2pp(x_start); glob_max_iter := 20; ! exact_soln_y2 := proc(x) cos(x); end; exact_soln_y2p := proc(x) -sin(x); end; exact_soln_y2pp := proc(x) -cos(x); end; exact_soln_y1 := proc(x) -sin(x); end;