Calculates the arccosine of a number.
|number||a number, or an expression that evaluates to a number|
Number, with the same number of decimal places as number.
Use $acos to calculate the arccosine (in radians) of a number. The value returned by this function has the same number of decimal places as number. The absolute value of the number must be between 0 and 1.
let vAngle = $acos(0.500)
The preceding command sets the third element of array variable vAngle to 1.047.