Calculates the arcsine of a number.
ASin ( expression )
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 -1.#IND for other values of x.
Related
Sin, Cos, Tan, ACos, ATan
Example
$x = ASin(0.5)
$pi = 3.14159265358979
$radToDeg = 180 / $pi
$y = ASin(1) * $radToDeg ;arcsine of 1 returns 90░