proposition: Lemma asin_geNpi2 x : -1 <= x <= 1 -> -(pi / 2) <= asin x.
proof: Proof. by move=> /asin_def[/andP[]]. Qed.
imports: mathcomp(all_ssreflect ssralg ssrint ssrnum matrix) mathcomp(interval rat) mathcomp(mathcomp_extra boolp classical_sets functions) reals ereal nsatz_realtype signed topology normedtype landau sequences derive realfun exp