diff ( y , x , 1 ) = arccos (x) ; ! max_terms := 30; Digits := 32; ! x_start := c(0.2); x_end := c(0.5); diff(y,0,exact_soln_y(x_start)); glob_look_poles := true; glob_display_interval := 0.0001; # # Not Given = 0 # Real = 1 # Complex = 2 # No Pole = 3 # Impossible Eq = 4 # glob_type_given_pole := 0; ! exact_soln_y := proc(x) return ( c(x) *arccos(c(x)) - sqrt(glob__1 - c(x) * c(x))); end;