package rpn.doubles;

import rpn.Calculator;

public class AcosItem extends FcnItem {
	
	public AcosItem(Calculator ca) {
		super(ca);
	}
	
	public double f(double x) {
		return(Math.acos(x));
	}
	
	public boolean inRange(double x) {
		return(-1.0 <= x && x <= 1.0);
	}
	
	public String toString() {
		return("acos");
	}
}