A nylon guitar string vibrates according to the equation y = 0.2 sin(2.28 x)sin(40π t) where x and y are in cm and t in seconds. What is the amplitude A of the two transversal waves that form this standing wave pattern?

• A. A = 0.1 cm
• B. A = 0.2 cm
• C. A = 1.14 cm
• D. A = 2.28 cm

Answer: (A)