/**
 * Write a description of class scienticFunctions here.
 *
 * @author (Roy Mpanju)
 * @version (a version number or a date)
 */

import java.lang.*;
public class scienticFunctions
{
    // instance variables - replace the example below with your own
    //private int x;

    /**
     * Constructor for objects of class scienticFunctions
     */
    // public scienticFunctions()
    // {
    // // initialise instance variables
    // x = 0;
    // }

    /**
     * A method - find the cosine of a given number
     *
     * @param  y  a sample parameter for a method
     * @return    the cosine of y
     */
    public double cosine(double y)
    {
        double x = Math.toRadians(y);

        return Math.cos(x);
    }

    /**
     * A method - find the sine of a given number by converting it to radians
     *
     * @param  y  a sample parameter for a method
     * @return    the sine of y
     */
    public static double sine(double y){
        return Math.sin(Math.toRadians(y));
    }
    
    public static double cos(double y){
        return Math.cos(Math.toRadians(y));
    }

    public double tangent(double y){
        return Math.tan(Math.toRadians(y));
    }

    public double inverseCosine(double y){
        return Math.acos(y) * 180/Math.PI;
    }

    public double inverseSine(double y){
        return (Math.asin(y))* 180/Math.PI;
    }

    public double inverseTangent(double y){
        return (Math.atan(y))*180/Math.PI;
    }
}