module.exports = function asin(arg) {
  //  discuss at: https://locutus.io/php/asin/
  // original by: Onno Marsman (https://twitter.com/onnomarsman)
  //      note 1: Sorry about the crippled test. Needed because precision differs accross platforms.
  //   example 1: (asin(0.3) + '').substr(0, 17)
  //   returns 1: "0.304692654015397"

  return Math.asin(arg)
}