Trigonometric Functions

  • George McCarty

Abstract

More than 4000 years ago the Egyptians used ropes knotted in lengths with the ratios 3 to 4 to 5 to form the sides of a triangle in order to determine a right angle. Buildings, and probably the pyramids, were thus erected with the use of elementary, practical trigonometry. Carpenters use this same trick today.

Keywords

Sine Pyramid 

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Copyright information

© EduCALC Publications 1982

Authors and Affiliations

  • George McCarty
    • 1
  1. 1.University of CaliforniaIrvineUSA

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