Solve the problem.On a Touch Tone phone, each button produces a unique sound. The sound produced is the sum of two tones and is given by and y = sin (2?ht), where l and h are the low and high frequencies (in hertz = Hz) associated with that button. The tone produced is thus given by y = sin (2?lt) + sin (2?ht). Write an expression that models the tone by pressing the "3" button as a product of sines and cosines.

Question

A. y = 2 sin (1906?t) cos (512?t)
B. y = 2 sin (512?t) cos (1906?t)
C. y = 2 sin (2174?t) cos (780?t)
D. y = 2 sin (780?t) cos (2174?t)

Answer 1

Answer: C