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math:asin

math:asin(
   $x as xs:double
) as xs:double

Summary

Returns the arc sine of x, in radians, in the range from -pi/2 to +pi/2 (inclusive).

Parameters
$x The fraction to be evaluated. Must be in the range of -1 to +1 (inclusive).

Example

  math:asin(.5)

  => 0.523598775598299

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