acos
type: function (subr) location: built-in source file: xlmath.c Common LISP compatible: yes supported on: all machines
SYNTAX
(acos <expr> )
<expr> - floating point number/expression
DESCRIPTION
The acos function returns the arc cosine of the <expr>. The result is in radians.
EXAMPLES
(acos 0.0) ; returns 1.5708 (acos 1.0) ; returns 0.0 (acos -1.0) ; returns 3.14159 (acos 0) ; error: bad integer operation