Reasoning and proof in trigonometry

• Arsalan Wares ^[1]
  1. [1] Valdosta State University

     Valdosta State University

     Estados Unidos

     
• Localización: International journal of mathematical education in science and technology, ISSN 0020-739X, Vol. 54, Nº. 1, 2023, págs. 141-144
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • The purpose of this short note is to derive the exact trigonometric ratios of 15° and 75° without using the sum and the difference formulae for cosine and sine