Function: asin

asin is a function defined in floatfns.c.

Signature

(asin ARG)

Documentation

Return the inverse sine of ARG.

Other relevant functions are documented in the number group.

View in manual

Probably introduced at or before Emacs version 24.3.

Shortdoc

;; number
(asin float-pi)
    => 0.0e+NaN

Source Code

// Defined in /usr/src/emacs/src/floatfns.c
{
  double d = extract_float (arg);
  d = asin (d);
  return make_float (d);
}