asin

public static double asin(double x)

The arcsine of the number expressed in radians. The returned value will be between -π/2 and π/2. NaN if the provided argument is out of range.

Parameters

x

The number to get the arcsine of.

Returns the arcsine (in radians) for a number within the range [-1, 1] (inclusive). If the provided number is out of range, NaN will be returned.

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import System;   Console.log(Math.asin(-2));  // NaN Console.log(Math.asin(1));   // 1.5707963267948966 Console.log(Math.asin(0.5)); // 0.5235987755982989