Find the equation of the standing wave. A string fixed at its two ends vibrates in its third mode of resonance. The left end of the string corresponds to x=0 and the right end corresponds to x= 1.2. The rope has a mass of 0.01 kg and the modulus of tension is 50 N. At the bellies, the maximum displacement relative to the equilibrium position is 0.15 m. Write the equation that represents the wave on the string. (we assume that the instant t = 0 is chosen so that the equation can be expressed in the form presented in this section.)

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