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acos ( numeric_expression )
returns float_expression
Computes the arc-cosine of epression. 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