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| function | asin | 
  Available in:
   Enterprise  | 
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Library: omtrig - trigonometry
 Include: omtrig.xin  | 
Return type: OMX Returns: The arc sine of the floating point value.  | 
  define external float function
       asin value float x
Use asin to calculate, in radians, the arc sine (inverse sine) of a floating point number. This trigonometric function works the same way as its equivalent in the C math library.
Out-of-range values, (|x| > 1), return "not a number" (NaN).
The following sample shows how to use asin to calculate the value of the arc sine of 0.999. The result is 1.526071239626164.
  include "omtrig.xin"
  process
     local float x initial {0.999}
     output "The arc sine of x is "
         || "d" % (asin x)
         || " %n"
  ; Output: "The arc sine of x is 1.526071239626164"
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Other Library Functions acos asin atan atan2 cos cosh hypot sin sinh tan tanh  | 
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