ACOS

The ACOS(a) function calculates the arc cosine of an expression a.

The expression a must be of absolute value less than or equal to 1. The value returned by ACOS lies in the range [0,] (that is, 0 ≤ ACOS(a) ≤ Π).

Format

ACOS(a)

Arguments

a Any valid function expression.
  Number of Arguments: 1