Using the TI-82 and TI-85 Graphing Calculators to Learn About Angles

Scott P. Randby

Department of Mathematics
Southeastern Oklahoma State University
Durant, OK 74701
USA
Phone: (405) 924-0121 x2776
randby@babbage.sosu.edu

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ABSTRACT

The programming and graphing features of the TI-82 and TI-85 calculators provide an ideal tool for trigonometric laboratories. Programs which enable students to explore the properties of angles and circular arcs are utilized in an in class laboratory. The laboratory allows students to approximate PI, discover the relation between radians and degrees, and to discover the formula for the length of a circular arc.

Keyword(s): TI-82, TI-85, trigonometry