Trigonometric Functions For Math Review

Purpose

To remind students of the definitions of sine and cosine.

Equipment

Disc-mounting rod assembly, wood stand with table clamp, metal stand with right-angle clamp, two stick pointers, nail; assembled as photographed on request.

Setup Time

5 minutes.

Images

a2-31

Description

Slowly rotate the unit circle of radius R. Students can easily observe the opposite side and the adjacent side.as the angle is changed. This provides a dynamic sense of the values of the sine and cosine in the first two quadrants.◙

References

(PIRA unavailable.)