Javascript arcsinjavascript arcsin In JavaScript, Math.asin() is a method that returns the arcsine (inverse sine) of a number in radians. The arcsine (asin) of a number is the angle whose sine is that number. Math.asin(x) finds the angle θ such that sin(θ) = x. The result is given in radians, and it falls within the range -π/2 to π/2 (-1.57 to 1.57 radians). https://docs.vultr.com/javascript/standard-library/Math/asin