Trigonometry Question
View this question.
Add this question to a group or test by clicking the appropriate button below.
Grade 11 Trigonometry CCSS: HSF-TF.B.5
Sound waves can be represented as trigonometric functions. Which of the following functions correctly describes the note A above middle C, which has a frequency of 440 Hz? 1 Hz (Hertz) is equal to one cycle per second. Assume that the note played has an amplitude of 40 dB. Also assume that if the function is graphed, the midline is the x-axis.
- f(t)=40sin(880πt)
- f(t)=20sin(880πt)+20
- f(t)=20sin(440t)
- f(t)=40sin(440t)