acos ( numeric_expression )
returns float_expression
Computes the arc-cosine of expression. Angles are expressed in radians (0 to 2pi).
Abs, Acos, Asin, Atan, Ceil, Cos, Degrees, Exp, Float, Floor, Int, IsNumeric, Log, Log10, Radians, Rand, Round, Seed, Sin, Sqr, Tan