Question: Two sinusoidal waves of the same frequency are to be sent in the same direction along a taut string. One wave has an amplitude of

Two sinusoidal waves of the same frequency are to be sent in the same direction along a taut string. One wave has an amplitude of 5.0 mm, the other 8.0 mm.
(a) What phase difference Φ1 between the two waves results in the smallest amplitude of the resultant wave?
(b) What is that smallest amplitude?
(c) What phase difference Φ2 results in the largest amplitude of the resultant wave?
(d) What is that largest amplitude?
(e) What is the resultant amplitude if the phase angle is (Φ1 = Φ2)/2?

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