ACos ( double value);

Default values:


Returns the arc cosine of a value in the range from 0 through pi.

Input parameters

Parameter Default value Description
value - Defines argument whose arc cosine is returned. Values for this argument must be in the [-1;1] range.


declare lower;
plot Data = Acos(0.5) == Double.Pi / 3;

The expression in the second line of code compares two values and draws a plot. If the two values are equal, it draws the unit (true) plot . Otherwise, it draws the zero (false) plot. The arc cosine of 0.5 equals pi/3. So the example draws the unit plot.