###Function###
ASin

###Description###
Calculates the arcsine of a number.

###Syntax###
ASin ( expression )


###Parameters###
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expression
	Any value between -1 and 1 (inclusive).
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###ReturnValue###
Returns the trigonometric arcsine of the number.  Result is in radians.


###Remarks###
<a href="ASin.htm">ASin</a>(x) is mathematically defined only for -1 <u>&lt;</u> x <u>&lt;</u> 1, so <a href="ASin.htm">ASin()</a> tends to return -1.#IND for other values of x.


###Related###
ACos, ATan, Cos, Sin, Tan


###Example###
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