how to get sin-1/arc sine in javascript

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#585

From: christoph_pfaffenbichler
Date: Sat, 17 Jan 2009 16:20

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This time I ask doubly humbled because not only am I weak in JavaScript but I�ve come to realize that I�ve gotten pretty bad at mathematics �
On my calculator the key �sin-1� (sinus to the power of negative one) gets me the angle in degrees if I enter the value I get by dividing the opposite side by the hypothenuse (of a right triangle naturally), but I can�t figure out how to achieve that in JavaScript.
The calculator-key signifies the arc sine, which the function Math.asin() should also provide but I don�t seem to get meaningful results, instead the result looks like what on my calculator is called the hyperbolic sine.
Could someone please help me out here Script- and/or math-wise?

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Subject: how to get sin-1/arc sine in javascript
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