Math.asin( ) Method

	ActionScript for Flash MX: The Definitive Guide, 2nd Edition By Colin Moock
	Chapter 18.  ActionScript Language Reference

Math.asin( ) Method

Flash 5; can be used when exporting Flash 4 movies

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compute the arc sine of a number

Math.asin(x)

Arguments

x

A number between -1.0 and 1.0 (the sine of an angle).

Returns

The angle, in radians, whose sine is x. If x is not in the range -1.0 to 1.0, returns NaN.

Description

The arc sine function (sometimes written as sin^-1) is the inverse of the sine function. It returns the angle whose sine has the specified value, in radians. The return value is in the range of -/2 to /2 radians.

Example

trace (Math.asin(1.0));  // Displays: 1.5707...  (i.e., pi/2) trace (Math.asin(0.0));  // Displays: 0

See Also

Math.acos( ), Math.atan( ), Math.sin( )