Library: Trigonometry (OMTRIG legacy) Include: omtrig.xin

Return type: opaque Returns: The arc sine of the floating point value.

Declaration

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"

Other Library Functions acos asin atan atan2 cos cosh hypot sin sinh tan tanh

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