Data type returned: Number, Time
• number—Any expression that resolves to a numeric value.
Returns the absolute value of number; absolute value is always a positive number.
Data type returned: Number
• number—Any expression that resolves to a numeric value from –1 to 1.
The arc cosine of a number is the angle (measured in radians) whose cosine is the specified number. The range of values returned by the
Acos function is 0 to Pi.
Acos (x) = y, then
Cos (y) = x.