Core Function ASin

ASin( <expression> )

Description

Calculates the arcsine of a number.

Parameters

expression

Any value between -1 and 1 (inclusive).

Return Value

Returns the trigonometric arcsine of expression. Result is in radians.

Remarks

ASin(x) is mathematically defined only for -1 < x < 1, so ASin tends to return NaN for other values of x.

Example

$x = ASin(0.5);
$radToDeg = 180 / @PI;
$y = ASin(1) * $radToDeg;
println( "Value is: $y " ); //arcsine of 1 returns 90°