text: /*-
   * Copyright (c) 2014-2018 Carsten Sonne Larsen <cs@innolan.net>
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   * Project homepage:
   * https://amath.innolan.net
   * 
   */
  
  #ifndef AMATH_FUNCTION_HAVERSEDCOSINE_H
  #define AMATH_FUNCTION_HAVERSEDCOSINE_H
  
  #include "node.h"
  
  /**
   * @brief A haversed cosine function in a syntax tree. 
   * @details
   * More info on the haversed cosine function is available at Wikipedia:
   * https://wikipedia.org/wiki/Havercosine
   *
   */
  class HaVersedCosineNode : public FunctionNode
  {
  public:
      explicit HaVersedCosineNode(ExpressionNode* expression, char* text, char* sys);
      static FunctionNode* Create(ExpressionNode* expression, char* text, char* sys);
      Number* Evaluate();
  };
  
  #endif
  