THE DEVELOPMENT OF INTERACTIVE SOFTWARE
FOR THE INTRODUCTION OF TRIGONOMETRY
By Lori Holcombe
Spring 1995
Computer-Assisted Instruction (CAI) uses state-of-the-art technology to allow a
more complete understanding of basic concepts for the aspiring mathematician. This
project applies findings of current educational research to the introduction of the basic
elements of trigonometry. The computer gives the student the freedom to explore
interesting areas without the tedium of calculating and graphing by hand. This will
enable more thorough learning of elemental trigonometry than has been evident using
traditional modes of instruction in a basic course.
This original computer program is a creative introduction to trigonometry. The
program is arranged in 38 screen presentations in HyperCard® format for Macintosh
computers. Each screen interactive and allows students to manipulate graphics and
calculations.
Dynamic graphics animate each lesson. Prerequisite algebra and geometry skills
are reviewed. The unit circle is employed in the definitions of degree, radian, sine,
cosine, and tangent. The original arc-based definitions are used to link geometric
concepts to the trigonometric basics. Cartesian graphs are thoroughly explored.
Three test screens provide a means of assessment for the user. Several screens
offer discovery environments which allow the investigation of key ideas. It is
recommended that this program be used by students interested in an alternative approach
to independent learning and by teachers as an enhancement to classroom instruction.