##### This *Trigonometric Functions for Pre-calculus* lesson plan also includes:

Students work in groups and measure the pressure waves created by a vibrating tuning fork in an activity called "Music to My Ears" prior to developing the trig functions that model his/her own physical, emotional, and intellectual biorhythms and graphing those functions. Students also use the process of experimental inquiry to examine the possible validity of the theory of biorhythms. Student collect biorhythm data for a month.

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