Util.java

package com.papagiannis.tuberun.osref;

/**
 * Some utility functions used by classes in the uk.me.jstott.jcoord package.
 * 
 * (c) 2006 Jonathan Stott
 * 
 * Created on 11-Feb-2006
 * 
 * @author Jonathan Stott
 * @version 1.0
 * @since 1.0
 */
class Util {

  /**
   * Calculate sin^2(x).
   * 
   * @param x
   *          x
   * @return sin^2(x)
   * @since 1.0
   */
  protected static double sinSquared(double x) {
    return Math.sin(x) * Math.sin(x);
  }


  /**
   * Calculate cos^2(x).
   * 
   * @param x
   *          x
   * @return cos^2(x)
   * @since 1.0
   */
  protected static double cosSquared(double x) {
    return Math.cos(x) * Math.cos(x);
  }


  /**
   * Calculate tan^2(x).
   * 
   * @param x
   *          x
   * @return tan^2(x)
   * @since 1.0
   */
  protected static double tanSquared(double x) {
    return Math.tan(x) * Math.tan(x);
  }


  /**
   * Calculate sec(x).
   * 
   * @param x
   *          x
   * @return sec(x)
   * @since 1.0
   */
  protected static double sec(double x) {
    return 1.0 / Math.cos(x);
  }
}